opinion: GLIDDEN COMPANY v. ZDANOK et al.
  No. 242.
  Argued February 21, 26, 1962.
  Decided June 25, 1962.
  Chester Bordean argued the cause for petitioner in No. 242. With him on the briefs was William P. Smith.
  Morris Shapiro argued the cause for respondents in No. 242. With him on the briefs was Harry Katz.
  Solicitor General Cox argued the cause for the United States, as intervenor, in No. 242. With him on the brief were Assistant Attorney General Miller, Oscar H. Davis and Philip R. Monahan.
  By special leave of Court, 368 U. S. 973, Francis M. Shea argued the cause in No. 242 for the Chief Judge and Associate Judges of the United States Court of Claims, as amici curiae, urging affirmance. With him on the briefs was Richard T. Conway.
  Briefs of amici curiae, in support of the petition in No. 242, were filed by William B. Barton for the Chamber of Commerce of the United States; John E. Branch for the Georgia State Chamber of Commerce; Henry E. Sey-farth for the Illinois State Chamber of Commerce; Edward C. First, Jr. and Gilbert Nurick for the Pennsylvania State Chamber of Commerce; Frank C. Heath for the Chamber of Commerce of the City of Cleveland, Ohio ; Charles H. Tuttle for the American Spice Trade Association; Carl M. Gould for the California Manufacturers Association; Ashley Sellers and Jesse E. Baskette for the National Association of Margarine Manufacturers; and Daniel S. Ring for the National Paint, Varnish and Lacquer Association, Inc.
  Eugene Gressman argued the cause and filed briefs for petitioner in No. 481.
  Solicitor General Cox argued the cause for the United States in No. 481. With him on the brief were Assistant Attorney General Miller, Oscar H. Davis, Beatrice Rosenberg and Philip R. Monahan.
  By special leave of Court, Roger Robb argued the cause and filed a brief in No. 481 for the Chief Judge and Associate Judges of the United States Court of Customs and Patent Appeals, as amici curiae, urging affirmance.
  Together with No. 481, Lurk v. United States, on certiorari to the United States Court of Appeals for the District of Columbia Circuit, argued February 21, 1962.
  MR. Justice Harlan
  announced the judgment of the Court and an opinion joined by Mr. Justice Brennan and Mr. Justice Stewart.
  In Ex parte Bakelite Corp., 279 U. S. 438, and Williams v. United States, 289 U. S. 553, this Court held that the United States Court of Customs and Patent Appeals and the United States Court of Claims were neither confined in jurisdiction nor protected in independence by Article III of the Constitution, but that both had been created by virtue of other, substantive, powers possessed by Congress under Article I. The Congress has since pronounced its disagreement by providing as to each that “such court is hereby declared to be a court established under article III of the Constitution of the United States.” The petitioners in these cases invite us to reaffirm the authority of our earlier decisions, and thus hold for naught these congressional pronouncements, at least as sought to be applied to judges appointed prior to their enactment.
  No. 242 is a suit brought by individual employees in a New York state court to recover damages for breach of a collective bargaining agreement, and removed to the Federal District Court for the Southern District of New York by the defendant employer on the ground of diversity of citizenship. The employees’ right to recover was sustained by a divided panel of the Court of Appeals, in an opinion by Judge J. Warren Madden, then an active judge of the Court of Claims sitting by designation of the Chief Justice of the United States under 28 U. S. C. § 293 (a). No. 481 is a criminal prosecution instituted in the United States District Court for the District of Columbia and resulting in a conviction for armed robbery. The trial was presided over by Judge Joseph R. Jackson, a retired judge of the Court of Customs and Patent Appeals sitting by similar designation. The petitioner’s application for leave to appeal to the Court of Appeals in forma pauperis, respecting the validity of this designation and alleged trial errors, was upheld by this Court last Term, 366 U. S. 712; we are now asked to review the Court of Appeals’ affirmance of his conviction. Because of the significance of the “designation” issue for the federal judicial system, we granted certiorari in the two cases, 368 U. S. 814, 815, limited to the question whether the judgment in either was vitiated by the respective participation of the judges named.
  The claim advanced by the petitioners, that they were denied the protection of judges with tenure and compensation guaranteed by Article III, has nothing to do with the manner in which either of these judges conducted himself in these proceedings. No contention is made that either Judge Madden or Judge Jackson displayed a lack of appropriate judicial independence, or that either sought by his rulings to curry favor with Congress or the Executive. Both indeed enjoy statutory assurance of tenure and compensation, and were it not for the explicit provisions of Article III we should be quite unable to say that either judge’s participation even colorably denied the petitioners independent judicial hearings.
  Article III, § 1, however, is explicit and gives the petitioners a basis for complaint without requiring them to point to particular instances of mistreatment in the record. It provides:
  “The judicial Power of the United States, shall be vested in one supreme Court, and in such inferior Courts as the Congress may from time to time ordain and establish. The Judges, both of the supreme and inferior Courts, shall hold their Offices during good Behaviour, and shall, at stated Times, receive for their Services, a Compensation, which shall not be diminished during their Continuance in Office.”
  Apart from this provision, it is settled that neither the tenure nor salary of federal officers is constitutionally protected from impairment by Congress. Crenshaw v. United States, 134 U. S. 99, 107-108; cf. Butler v. Pennsylvania, 10 How. 402, 416-418. The statutory declaration, therefore, that the judges of these two courts should serve during good behavior and with undiminished salary, see note 5, supra, was ineffective to bind any subsequent Congress unless those judges were invested at appointment with the protections of Article III. United States v. Fisher, 109 U. S. 143, 145; see McAllister v. United States, 141 U. S. 174, 186. And the petitioners naturally point to the Bakelite and Williams cases, supra, as establishing that no such constitutional protection was in fact conferred.
  The distinction referred to in those cases between “constitutional” and “legislative” courts has been productive of much confusion and controversy. Because of the highly theoretical nature of the problem in its present context, we would be well advised to decide these cases on narrower grounds if any are fairly available. But for reasons that follow, we find ourselves unable to do so.
  I.
  No challenge to the authority of the judges was filed in the course of the proceedings before them in either case. The Solicitor General, who submitted briefs and arguments for the United States, has seized upon this circumstance to suggest that the petitioners should be precluded by the so-called de facto doctrine from questioning the validity of these designations for the first time on appeal.
  Whatever may be the rule when a judge’s authority is challenged at the earliest practicable moment, as it was in United States v. American-Foreign S. S. Corp., 363 U. S. 685, in other circumstances involving judicial authority this Court has described it as well settled “that where there is an office to be filled and one acting under color of authority fills the office and discharges its duties, his actions are those of an officer de facto and binding upon the public.” McDowell v. United States, 159 U. S. 596, 602. The rule is founded upon an obviously sound policy of preventing litigants from abiding the outcome of a lawsuit and then overturning it if adverse upon a technicality of which they were previously aware. Although a United States Attorney may be permitted on behalf of the public to upset an order issued upon defective authority, Frad v. Kelly, 302 U. S. 312, a private litigant ordinarily may not. Ball v. United States, 140 U. S. 118, 128-129.
  The rule does not obtain, of course, when the alleged defect of authority operates also as a limitation on this Court’s appellate jurisdiction. Ayrshire Collieries Corp. v. United States, 331 U. S. 132 (three-judge court); United States v. Emholt, 105 U. S. 414 (certificate of divided opinion). In other circumstances as well, when the statute claimed to restrict authority is not merely technical but embodies a strong policy concerning the proper administration of judicial business, this Court has treated the alleged defect as “jurisdictional” and agreed to consider it on direct review even though not raised at the earliest practicable opportunity. E. g., American Construction Co. v. Jacksonville, T. & K. W. R. Co., 148 U. S. 372, 387-388.
  A fortiori is this so when the challenge is based upon nonfrivolous constitutional grounds. In McDowell v. United States itself, supra, at 598-599, the Court, while, holding that any defect in statutory authorization for a particular intracircuit assignment was immunized from examination by the de facto doctrine, specifically passed upon and upheld the constitutional authority of Congress to provide for such an assignment. And in Lamar v. United States, 241 U. S. 103, 117-118, the claim that an intercircuit assignment violated the criminal venue restrictions of the Sixth Amendment and usurped the presidential appointing power under Art. II, § 2, was heard here and determined upon its merits, despite the fact that it had not been raised in the District Court or in the Court of Appeals or even in this Court until the filing of a supplemental brief upon a second request for review.
  The alleged defect of authority here relates to basic constitutional protections designed in part for the benefit of litigants. See O’Donoghue v. United States, 289 U. S. 516, 532-534. It should be examinable at least on direct review, where its consideration encounters none of the objections associated with the principle of res judicata, that there be an end to litigation. At the most is weighed in opposition the disruption to sound appellate process entailed by entertaining objections not raised below, and that is plainly insufficient to overcome the strong interest of the federal judiciary in maintaining the constitutional plan of separation of powers. So this Court has con-eluded on an analogous balance struck to protect against intruding federal jurisdiction into the area constitutionally reserved to the States: Whether diversity of citizenship exists may be questioned on direct review for the first time in this Court. Mansfield, C. & L. M. R. Co. v. Swan, 111 U. S. 379, 382; City of Gainesville v. Brown-Crummer Investment Co., 277 U. S. 54, 59. We hold that it is similarly open to these petitioners to challenge the constitutional authority of the judges below.
  II.
  The Court of Appeals for the District of Columbia found it unnecessary to reach the question whether Judge Jackson enjoyed constitutional security of tenure and compensation. It held that even if he did not, Congress might authorize his assignment to courts in the District of Columbia, by virtue of its power “To exercise exclusive Legislation in all Cases whatsoever” over the District. Art. I, § 8, cl. 17. The Solicitor General, in support of that ruling, argues here that because the criminal charge against petitioner Lurk was violation of a local statute, D. C. Code, 1961, § 22^2901, rather than of one national in application, its trial did not require the assignment of an Article III judge.
  The question thus raised is itself of constitutional dimension, and one which we need not reach if an Article III judge was in fact assigned. In the companion case, No. 242, the necessity for such a judge is uncontested. The Court of Appeals for the Second Circuit sat to determine a question of state contract law presented for its decision solely by reason of the diverse citizenship of the litigants. Authority for the Federal Government to decide questions of state law exists only by virtue of the Diversity Clause in Article III. Erie R. Co. v. Tompkins, 304 U. S. 64; see Murray’s Lessee v. Hoboken Land & Improvement Co., 18 How. 272 284. For this reason, the question whether Judge Madden enjoyed constitutional independence is inescapably presented. Since decision of that question involves considerations bearing directly upon the constitutional status of Judge Jackson, we deem it appropriate to dispose of both cases on the same grounds, without at present intimating any view as to the correctness of the holding below by the Court of Appeals for the District of Columbia.
  III.
  The next question is whether the character of the judges who sat in these cases may be determined without reference to the character of the courts to which they were originally appointed. If it were plain that these judges were invested upon confirmation with Article III tenure and compensation, it would be unnecessary for present purposes to consider the constitutional status of the Court of Claims and the Court of Customs and Patent Appeals.
  No such course, however, appears to be open. The statutes under which Judge Madden and Judge Jackson were appointed speak of service only on those courts. 28 U. S. C. §§ 171, 211. They were not, as were the judges selected for the late Commerce Court, appointed as “additional circuit judges,” Act of June 18, 1910, c. 309, 36 Stat. 539, 540, whose tenure might be constitutionally secured regardless of the fortunes of their courts. See 50 Cong. Rec. 5409-5418 (1913); Donegan v. Dyson, 269 U. S. 49; Frankfurter and Landis, The Business of the Supreme Court (1927), 168-173. It is true that at the time of Judge Jackson’s appointment there was in force a statute authorizing assignment of Court of Customs and Patent Appeals judges to serve on the courts of the District of Columbia. Act of September 14, 1922, c. 306, § 5, 42 Stat. 837, 839. At that time, however, before the O’Donoghue decision, there seems to have been a consensus that the courts of the District were not confined or protected by Article III; as late as 1930, this Court regarded it as “recognized that the courts of the District of Columbia are not created under the judiciary article of the Constitution but are legislative courts . . . .” Federal Radio Comm’n v. General Electric Co., 281 U. S. 464, 468; and see Katz, Federal Legislative Courts, 43 Harv. L. Rev. 894, 899-903 (1930). The 1922 Act cannot therefore be viewed ex proprio vigore as conferring Article III status on judges subsequently appointed to the Court of Customs and Patent Appeals.
  A more novel suggestion is that the assignment statute itself, 28 U. S. C. §§ 291-296, authorized the Chief Justice to appoint inferior Article III judges in the course of designating them for service on Article III courts. See Shartel, Federal Judges — Appointment, Supervision, and Removal — Some Possibilities under the Constitution, 28 Mich. L. Rev. 485 (1930); cf. Ex parte Siebold, 100 U. S. 371, 397-398; Rice v. Ames, 180 U. S. 371, 378. But we need not consider the constitutional questions involved in this suggestion, for the statute does not readily lend itself to such a construction. If nothing else, the authority given the Chief Justice in 28 U. S. C. § 295 to revoke assignments previously made is wholly inconsistent with a reading of the statute as empowering him to appoint inferior Article III judges. Judges assigned by the Chief Justice who are not previously endowed with constitutional security of tenure and compensation thus can gain nothing by the designation.
  It is significant that Congress did not enact the present broad assignment statute until after it had declared the Court of Claims and the Court of Customs and Patent Appeals to be constitutional courts. Act of August 25, 1958, 72 Stat. 848. A major purpose of these declarations was to eliminate uncertainty whether regular Article III judges might be assigned to assist in the business of those courts when disability or disqualification made it difficult for them to obtain a quorum. Those doubts, suggested by dicta in Ex parte Bakelite Corp., 279 U. S. 438, 460, would be expanded rather than allayed were we to hold that the judges of the Court of Claims and the Court of Customs and Patent Appeals enjoy the protections of Article III while leaving at large the status of those courts. For these various reasons, the constitutional quality of tenure and compensation extended Judges Madden and Jackson at the time of their confirmation must be deemed to have depended upon the constitutional status of the courts to which they were primarily appointed.
  IV.
  In determining the constitutional character of the Court of Claims and the Court of Customs and Patent Appeals, as we are thus led to do, we may not disregard Congress’ declaration that they were created under Article III. Of course, Congress may not by fiat overturn the constitutional decisions of this Court, but the legislative history of the 1953 and 1958 declarations makes plain that it was far from attempting any such thing. Typical is a statement in the 1958 House Report that the purpose of the legislation was to “declare which of the powers Congress was intending to exercise when the court was created.” H. R. Rep. No. 2349, 85th Cong., 2d Sess. 3 (1958); accord, H. R. Rep. No. 695, 83d Cong., 1st Sess. 3, 5, 7 (1953); and see S. Rep. No. 275, 83d Cong., 1st Sess. 2 (1953), substituted for S. Rep. No. 261, 83d Cong., 1st Sess. 2 (1953); 99 Cong. Rec. 8943, 8944 (1953) (remarks of Senator Gore).
  “Subsequent legislation which declares the intent of an earlier law,” this Court has noted, “is not, of course, conclusive in determining w'hat the previous Congress meant. But the later law is entitled to weight when it comes to the problem of construction.” Federal Housing Administration v. Darlington, Inc., 358 U. S. 84, 90; accord, New York, P. & N. R. Co. v. Peninsula Exchange, 240 U. S. 34, 39. Especially is this so when the Congress has been stimulated by decisions of this Court to investigate the historical materials involved and has drawn from them a contrary conclusion. United States v. Hutcheson, 312 U. S. 219, 235-237. As examination of the House and Senate Reports makes evident, that is what occurred here. E. g., S. Rep. No. 2309, 85th Cong., 2d Sess. 2-3 (1958); H. R. Rep. No. 695, 83d Cong., 1st Sess. 3-5 (1953).
  At the time when Bakelite and Williams were decided, the Court did not have the benefit of this congressional understanding. The Williams case, for example, arose under the Legislative Appropriation Act of June 30, 1932, c. 314, § 107 (a)(5), 47 Stat. 382, 402, which reduced the salary of all judges “except judges whose compensation may not, under the Constitution, be diminished during their continuance in office.” Mr. Justice Sutherland, who wrote the Court’s opinions in both Williams and O’Don-oghue, was plainly disadvantaged by the absence of congressional intimation as to which judges of which courts were to be deemed exempted. See O’Donoghue v. United States, 289 U. S. 516, 529.
  In the Bakelite case, to be sure, Mr. Justice Van De-vanter said of an argument drawn from tenuous evidence of congressional understanding that it “mistakenly assumes that whether a court is of one class or the other depends on the intention of Congress, whereas the true test lies in the power under which the court was created and in the jurisdiction conferred.” 279 U. S., at 459. Yet he would hardly have denied that explicit evidence of legislative intendment concerning the factors he thought controlling may be relevant and indeed highly persuasive. In any event, the Bakelite dictum did not embarrass the Court in deciding O’Donoghue, where it looked searchingly at “congressional practice” to determine what classification that body “recognizes.” 289 U. S., at 548-550. We think the forthright statement of understanding embraced in the 1953 and 1958 declarations may be taken as similarly persuasive evidence for the problem now before us.
  To give due weight to these congressional declarations is not of course to compromise the authority or responsibility of this Court as the ultimate expositor of the Constitution. The Bakelite and Williams decisions have long been considered of questionable soundness. See, e. g., Brown, The Rent in Our Judicial Armor, 10 G. W. L. Rev. 127 (1941); Hart and Wechsler, The Federal Courts and the Federal System (1953), 348-351; 1 Moore, Federal Practice (2d ed. 1961), 71 n. 21. They stand uneasily next to O’Donoghue, much of whose reasoning in sustaining the Article III status of the District of Columbia superior courts seems applicable to the Court of Claims and the Court of Customs and Patent Appeals. In Pope v. United States, 323 U. S. 1, 13-14, where the Solicitor General argued at length against the continued vitality of Bakelite and Williams, their authority was regarded as an open question.
  Furthermore, apart from this Court’s considered practice not to apply stare decisis as rigidly in constitutional as in nonconstitutional cases, e. g., United States v. South Buffalo R. Co., 333 U. S. 771, 774-775; see Burnet v. Coronado Oil & Gas Co., 285 U. S. 393, 405-408 and n. 1-3 (Brandéis, J., dissenting), there is the fact that Congress has acted on its understanding and has provided for assignment of judges who have made decisions that are now said to be impeachable. In these circumstances, the practical consideration underlying the doctrine of stare decisis — protection of generated expectations — actually militates in favor of reexamining the decisions. We are well-advised, therefore, to regard the questions decided in those cases as entirely open to reconsideration.
  Y.
  The Constitution nowhere makes reference to “legislative courts.” The power given Congress in Art. I, § 8, cl. 9, “To constitute Tribunals inferior to the supreme Court,” plainly relates to the “inferior Courts” provided for in Art. Ill, § 1; it has never been relied on for establishment of any other tribunals.
  The concept of a legislative court derives from the opinion of Chief Justice Marshall in American Insurance Co. v. Canter, 1 Pet. 511, dealing with courts established in a territory. A cargo of cotton salvaged from a wreck off the coast of Florida had been purchased by Canter at a judicial sale ordered by a court at Key West invested by the territorial legislature with jurisdiction over cases of salvage. The insurers, to whom the property in the cargo had been abandoned by the owners, brought a libel for restitution, claiming in part that the prior decree was void because not rendered in a court created by Congress, as required for the exercise of admiralty jurisdiction under Article III. Chief Justice Marshall for the Court swept this objection aside by noting that the Superior Courts of Florida, which had been created by Congress, were staffed with judges appointed for only four years, and concluded that Article III did not apply in the territories:
  “These Courts, then, are not constitutional Courts, in which the judicial power conferred by the Constitution on the general government, can be deposited. They are incapable of receiving it. They are legislative Courts, created in virtue of the general right of sovereignty which exists in the government, or in virtue of that clause which enables Congress to make all needful rules and regulations, respecting the territory belonging to the United States.” 1 Pet., at 546.
  By these arresting observations the Chief Justice certainly did not mean to imply that the case heard by the Key West court was not one of admiralty jurisdiction otherwise properly justiciable in a Federal District Court sitting in one of the States. Elsewhere in the opinion he distinctly referred to the provisions of Article III to show that it was such a case. 1 Pet., at 545. All the Chief Justice meant, and what the case has ever after been taken to establish, is that in the territories cases and controversies falling within the enumeration of Article III may be heard and decided in courts constituted without regard to the limitations of that article; courts, that is, having judges of limited tenure and entertaining business beyond the range of conventional cases and controversies.
  The reasons for this are not difficult to appreciate so long as the character of the early territories and some of the practical problems arising from their administration are kept in mind. The entire governmental responsibility in a territory where there was no state government to assume the burden of local regulation devolved upon the National Government. This meant that courts had to be established and staffed with sufficient judges to handle the general jurisdiction that elsewhere would have been exercised in large part by the courts of a State. But when the territories began entering into statehood, as they soon did, the authority of the territorial courts over matters of state concern ceased; and in a time when the size of the federal judiciary was still relatively small, that left the National Government with a significant number of territorial judges on its hands and no place to put them. When Florida was admitted as a State, for example, Congress replaced three territorial courts of general jurisdiction comprising five judges with one Federal District Court and one judge.
  At the same time as the absence of a federal structure in the territories produced problems not foreseen by the Framers of Article III, the realities of territorial government typically made it less urgent that judges there enjoy the independence from Congress and the President envisioned by that article. For the territories were not ruled immediately from Washington; in a day of poor roads and slow mails, it was unthinkable that they should be. Rather, Congress left municipal law to be developed largely by the territorial legislatures, within the framework of organic acts and subject to a retained power of veto. The scope of self-government exercised under these delegations was nearly as broad as that enjoyed by the States, and the freedom of the territories to dispense with protections deemed inherent in a separation of governmental powers was as fully recognized.
  Against this historical background, it is hardly surprising that Chief Justice Marshall decided as he did. It would have been doctrinaire in the extreme to deny the right of Congress to invest judges of its creation with authority to dispose of the judicial business of the territories. It would have been at least as dogmatic, having recognized the right, to fasten on those judges a guarantee of tenure that Congress could not put to use and that the exigencies of the territories did not require. Marshall chose neither course; conscious as ever of his responsibility to see the Constitution work, he recognized a greater flexibility in Congress to deal with problems arising outside the normal context of a federal system.
  The same confluence of practical considerations that dictated the result in Canter has governed the decision in later cases sanctioning the creation of other courts with judges of limited tenure. In United States v. Coe, 155 U. S. 76, 85-86, for example, the Court sustained the authority of the Court of Private Land Claims to adjudicate claims under treaties to land in the territories, but left it expressly open whether such a course might be followed within the States. The Choctaw and Chickasaw Citizenship Court was similarly created to determine questions of tribal membership relevant to property claims within Indian territory under the exclusive control of the National Government. See Stephens v. Cherokee Nation, 174 U. S. 445; Ex parte Joins, 191 U. S. 93; Wallace v. Adams, 204 U. S. 415. Upon like considerations, Article III has been viewed as inapplicable to courts created in unincorporated territories outside the mainland, Downes v. Bidwell, 182 U. S. 244, 266-267; Balzac v. Porto Rico, 258 U. S. 298, 312-313; cf. Dorr v. United States, 195 U. S. 138, 145, 149, and to the consular courts established by concessions from foreign countries, In re Ross, 140 U. S. 453, 464-465, 480.
  The touchstone of decision in all these cases has been the need to exercise the jurisdiction then and there and for a transitory period. Whether constitutional limitations on the exercise of judicial power have been held inapplicable has depended on the particular local setting, the practical necessities, and the possible alternatives. When the peculiar reasons justifying investiture of judges with limited tenure have not been present, the Canter holding has not been deemed controlling. O’Donoghue v. United States, 289 U. S. 516, 536-539.
  Since the conditions obtaining in one territory have been assumed to exist in each, this Court has in the past entertained a presumption that even those territorial judges who have been extended statutory assurances of life tenure and undiminished compensation have been so favored as a matter of legislative grace and not of constitutional compulsion. McAllister v. United States, 141 U. S. 174, 186. By a parity of reasoning, however, the presumption should be reversed when Congress creates courts the continuing exercise of whose jurisdiction is unembarrassed by such practical difficulties. See Mookini v. United States, 303 U. S. 201, 205. As the Bakelite and Williams opinions recognize, the Court of Claims and the Court of Customs and Patent Appeals were created to carry into effect powers enjoyed by the National Government over subject matter — roughly, payment of debts and collection of customs revenue — and not over localities. What those opinions fail to deal with is whether that distinction deprives American Insurance Co. v. Canter of controlling force.
  The Bakelite opinion did not inquire whether there might be such a distinction. After sketching the history of the territorial and consular courts, it continued at once:
  “Legislative courts also may be created as special tribunals to examine and determine various matters, arising between the government and others, which from their nature do not require judicial determination and yet are susceptible of it.” 279 U. S., at 451.
  Since in the Court’s view the jurisdiction conferred on both the Court of Claims and the Court of Customs and Patent Appeals included “nothing which inherently or necessarily requires judicial determination,” both could have been and were created as legislative courts.
  We need not pause to assess the Court’s characterization of the jurisdiction conferred on those courts, beyond indicating certain reservations about its accuracy. Nor need we now explore the extent to which Congress may commit the execution of even “inherently” judicial business to tribunals other than Article III courts. We may and do assume, for present purposes, that none of the jurisdiction vested in our two courts is of that sort, so that all of it might be committed for final determination to non-Article III tribunals, be they denominated legislative courts or administrative agencies.
  But because Congress may employ such tribunals assuredly does not mean that it must. This is the crucial non sequitur of the Bakelite and Williams opinions. Each assumed that because Congress might have assigned specified jurisdiction to an administrative agency, it must be deemed to have done so even though it assigned that jurisdiction to a tribunal having every appearance of a court and composed of judges enjoying statutory assurances of life tenure and undiminished compensation. In so doing, each appears to have misunderstood the thrust of the celebrated observation by Mr. Justice Curtis, that
  . . there are matters, involving public rights, which may be presented in such form that the judicial power is capable of acting on them, and which are susceptible of judicial determination, but which congress may or may not bring within the cognizance of the courts of the United States, as it may deem proper.” Murray’s Lessee v. Hoboken Land & Improvement Co., 18 How. 272, 284.
  This passage, cited in both the Bakelite and Williams opinions, plainly did not mean that the matters referred to could not be entrusted to Article III courts. Quite the contrary, the explicit predicate to Justice Curtis’ argument was that such courts could exercise judicial power over such cases. For the very statute whose authorization of summary distress proceedings was sustained in the Murray case, also authorized the distrainee to bring suit to arrest the levy against the United States in a Federal District Court. And as to this, the author of the opinion stated, just before his more trenchant remark quoted above:
  “The United States consents that this fact of indebtedness may be drawn in question by a suit against them. Though they might have withheld their consent, we think that, by granting it, nothing which may not be a subject of judicial cognizance is brought before the court.”
  Thus Murray’s Lessee, far from furnishing authority against the proposition that the Court of Claims is a constitutional court, actually supports it.
  To deny that Congress may create tribunals under Article III for the sole purpose of adjudicating matters that it might have reserved for legislative or executive decision would be to deprive it of the very choice that Mr. Justice Curtis insisted it enjoys. Of course possession of the choice, assuming it is coextensive with the range of matters confided to the courts, subjects those courts to the continuous possibility that their entire jurisdiction may be withdrawn. See Williams v. United States, 289 U. S. 553, 580-581. But the threat thus facing their independence is not in kind or effect different from that sustained by all inferior federal courts. The great constitutional compromise that resulted in agreement upon Art. Ill, § 1, authorized but did not obligate Congress to create inferior federal courts. I Farrand, The Records of the Federal Convention (1911), 118, 124 — 125; The Federalist, No. 81 (Wright ed. 1961), at 509 (Hamilton). Once created, they passed almost a century without exercising any very significant jurisdiction. Warren, New Light on the History of the Federal Judiciary Act of 1789, 37 Harv. L. Rev. 49, 65-70 (1923); Frankfurter, Distribution of Judicial Power Between United States and State Courts, 13 Cornell L. Q. 499 (1928). Throughout this period and beyond it up to today, they remained constantly subject to jurisdictional curtailment. Turner v. Bank of North America, 4 Dall. 8, 10 note (Chase, J.); Cary v. Curtis, 3 How. 236, 245; Sheldon v. Sill, 8 How. 441, 449; Kline v. Burke Construction Co., 260 U. S. 226, 233-234. Even if it should be conceded that the Court of Claims or the Court of Customs and Patent Appeals is any more likely to be supplanted, we do not think the factor of constitutional significance.
  What has been said should suffice to demonstrate that whether a tribunal is to be recognized as one created under Article III depends basically upon whether its establishing legislation complies with the limitations of that article; whether, in other words, its business is the federal business there specified and its judges and judgments are allowed the independence, there expressly or impliedly made requisite. To ascertain whether the courts now under inquiry can meet those tests, we must turn to examine their history, the development of their functions, and their present characteristics.
  VI.
  A. Court of Claims. — The Court of Claims was created by the Act of February 24, 1855, c. 122, 10 Stat. 612, primarily to relieve the pressure on Congress caused by the volume of private bills. As an innovation the court was at first regarded as an experiment, and some of its creators were reluctant to give it all the attributes of a court by making its judgments final; instead it was authorized to hear claims and report its findings of fact and opinions to Congress, together with drafts of bills designed to carry its recommendations into effect. §7, 10 Stat. 613; see Cong. Globe, 33d Cong., 2d Sess. 70-72 (1854) (remarks of Senators Brodhead and Hunter). From the outset, however, a majority of the court’s proponents insisted that its judges be given life tenure as a means of assuring independence of judgment, and their proposal won acceptance in the Act. § 1,10 Stat. 612; see Cong. Globe, 33d Cong., 2d Sess. 71, 108-109 (Senator Hunter); 72 (Senator Clayton); 106 (Senator Brodhead); 110 (Senator Pratt); 114, 902 (the votes). Indeed there are substantial indications in the debates that Congress thought it was establishing a court under Article III. Cong. Globe, 33d Cong., 2d Sess. 108-109 (Senator Hunter); 110-111 (Senator Pratt); 111 (Senator Clayton); 113 (Senators Stuart and Douglas).
  By the end of 1861, however, it was apparent that the limited powers conferred on the court were insufficient to relieve Congress from the laborious necessity of examining the merits of private bills. In his State of the Union message that year, President Lincoln recommended that the legislative design to provide for the independent adjudication of claims against the United States be brought to fruition by making the judgments of the Court of Claims final. The pertinent text of his address is as follows, Cong. Globe, 37th Cong., 2d Sess., Appendix, p. 2:
  “It is as much the duty of Government to render prompt justice against itself, in favor of citizens, as it is to administer the same between private individuals. The investigation and adjudication of claims, in their nature belong to the judicial department .... It was intended by the organization of the Court of Claims mainly to remove this branch of business from the Halls of Congress; but while the court has proved to be an effective and valuable means of investigation, it in great degree fails to effect the object of its creation, for want of power to make its judgments final.”
  By the Act of March 3, 1863, c. 92, § 5, 12 Stat. 765, 766, Congress adopted the President’s recommendation and made the court’s judgments final, with appeal to the Supreme Court provided in certain cases. The significance of this nearly contemporaneous enactment for the light it sheds on the aims of the 1855 Congress is apparent.
  There was one further impediment. Section 14 of the 1863 Act, 12 Stat. 768, provided that “no money shall be paid out of the treasury for any claim passed upon by the court of claims till after an appropriation therefor shall be estimated for by the Secretary of the Treasury.” In Gordon v. United States, 2 Wall. 561, this Court refused to review a judgment of the Court of Claims because it construed that section as giving the Secretary a revisory authority over the court inconsistent with its exercise of judicial power. Congress promptly repealed the offensive section, Act of March 17, 1866, c. 19, § 1, 14 Stat. 9, once again exhibiting its purpose to liberate the Court of Claims from itself and the Executive. Thereafter, the Supreme Court promulgated rules governing appeals from the court, 3 Wall, vii-viii, and took jurisdiction under them for the first time in De Groot v. United States, 5 Wall. 419.
  The early appeals entertained by the Court furnish striking evidence of its understanding that the Court of Claims had been vested with judicial power. In De Groot the court had been given jurisdiction by special bill only after the passage of two private bills had failed to produce agreement by administrative officials upon adequate recompense. This Court was thus presented with a vivid illustration of the ways in which the same matter might be submitted for resolution to a legislative committee, to an executive officer, or to a court, Murray’s Lessee, supra, and nevertheless accepted appellate jurisdiction over what was, necessarily, an exercise of the judicial power which alone it may review. Marbury v. Madison, 1 Cranch 137, 174-175.
  After the repeal of § 14, the Court was quick to protect the Court of Claims’ judgments from executive revision. In United States v. O’Grady, 22 Wall. 641, a judgment had been diminished by the Secretary of the Treasury in an amount equal to a tax assertedly due, although the United States had not pleaded a set-off as it was entitled by the 1863 Act to do. The Court of Claims and this Court on appeal held the deduction unwarranted in law, with the following pertinent closing observation:
  “Should it be suggested that the judgment in question was rendered in the Court of Claims, the answer to the suggestion is that the judgment of the Court of Claims, from which no appeal is taken, is just as conclusive under existing laws as the judgment of the Supreme Court, until it is set aside on a motion for a new trial.”
  Like views abound in the early reports. In United States v. Union Pacific R. Co., 98 U. S. 569, 603, for example, referring to Article III, the Court said:
  “Congress has, under this authority, created the district courts, the circuit courts, and the Court of Claims, and vested each of them with a defined portion of the judicial power found in the Constitution.”
  Such remained the view of the Court as late as Miles v. Graham, 268 U. S. 501, decided in 1925. There it was held, on the. authority of Evans v. Gore, 253 U. S. 245, that the salary of a Court of Claims judge appointed even after enactment of the taxing statute in question was not subject to such diminution. Although the case was after-wards overruled on this point, O’Malley v. Woodrough, 307 U. S. 277, 283, what is of continuing interest is the Court’s reliance in Miles upon Evans v. Gore, where Mr. Justice Van Devanter for the Court devoted six full pages to recitation of the importance of the guarantees of tenure and salary contained in Article III. How it was possible to say in Bakelite, 279 U. S., at 455, that the Court in Miles, decided only five years after Evans and with copious quotation from it, was unaware of the crucial question whether Article III extended its protection to a judge of the Court of Claims, is very difficult to understand.
  In actuality, the Court’s pre-Bakelite view of the Court of Claims is supported by the evidence of increasing confidence placed in that tribunal by Congress. The Tucker Act, § 1, 24 Stat. 505 (1887), now 28 U. S. C. § 1491, greatly expanded the jurisdiction of the court by authorizing it to adjudicate
  “All claims founded upon the Constitution of the United States or any law of Congress, except for pensions, or upon any regulation of an Executive Department, or upon any contract, express or implied, with the Government of the United States, or for damages, liquidated or unliquidated, in cases not sounding in tort, in respect of which claims the party would be entitled to redress against the United States either in a court of law, equity, or admiralty if the United States were suable . . . .”
  All of the cases within this grant of jurisdiction arise either immediately or potentially under federal law within the meaning of Art. Ill, § 2. Osborn v. Bank of the United States, 9 Wheat. 738, 818-819, 823-825; see Clearfield Trust Co. v. United States, 318 U. S. 363; Federal Crop Insurance Corp. v. Merrill, 332 U. S. 380; Mishkin, The Federal “Question” in the District Courts, 53 Col. L. Rev. 157, 184-196. The cases heard by the Court have been as intricate and far-ranging as any coming within the federal-question jurisdiction, 28 U. S. C. § 1331, of the District Courts. E. g., Causby v. United States, 104 Ct. Cl. 342, 60 F. Supp. 751, remanded for further findings, 328 U. S. 256 (eminent domain); Lovett v. United States, 104 Ct. Cl. 557, 66 F. Supp. 142, aff’d, 328 U. S. 303 (bill of attainder); Shapiro v. United States, 107 Ct. Cl. 650, 69 F. Supp. 205 (military due process). In none of these cases, nor in others, could it well be suggested that the Court of Claims had adjudged the issues, no matter how important to the Government, otherwise than dispassionately.
  Indeed there is reason to believe that the Court of Claims has been constituted as it is precisely to the end that there may be a tribunal specially qualified to hold the Government to strict legal accounting. From the beginning it has been given jurisdiction only to award damages, not specific relief. United States v. Alire, 6 Wall. 573; United States v. Jones, 131 U. S. 1; see Schwartz and Jacoby, Government Litigation (tentative ed. 1960), 123-126. No question can be raised of Congress’ freedom, consistently with Article III, to impose such a limitation upon the remedial powers of a federal court. Lauf v. E. G. Shinner & Co., 303 U. S. 323, 330 (Norris-LaGuardia Act). But far from serving as a restriction, this limitation has allowed the Court of Claims a greater freedom than is enjoyed by other federal courts to inquire into the legality of governmental action. See Larson v. Domestic & Foreign Commerce Corp., 337 U. S. 682, 703-704; Malone v. Bowdoin, 369 U. S. 643; Brenner, Judicial Review by Money Judgment in the Court of Claims, 21 Fed. B. J. 179 (1961).
  “If there are such things as political axioms,” said Alexander Hamilton, “the propriety of the judicial power of a government being coextensive with its legislative, may be ranked among the number.” The Federalist, No. 80 (Wright ed. 1961), at 500. His sentiments were not ignored by the Framers of Article III. The Randolph plan, which formed the basis of that article, called for establishment of a national judiciary coextensive in authority with the executive and legislative branches. IV Farrand, The Records of the Federal Convention (rev. ed. 1937), 47-48. For, as Hamilton observed, a chief defect of the Confederation had been “. . . the want of a judiciary power. Laws are a dead letter without courts to expound and define their true meaning and operation.” The Federalist, No. 22 (Wright ed. 1961), at 197. But because of the barrier of sovereign immunity, the laws controlling governmental rights and obligations could not for years obtain a fully definitive exposition. The creation of the Court of Claims can be viewed as a fulfillment of the design of Article III.
  B. The Court of Customs and Patent Appeals. — The Court of Customs Appeals, as it was first known, was established by § 29 of the Customs Administrative Act of 1890, c. 407, 26 Stat. 131, as added by § 28 of the Payne-Aldrich Tariff Act of August 5, 1909, c. 6, 36 Stat. 11, 105, to review by appeal final decisions of the Board of General Appraisers (now Customs Court) respecting the classification and rate of duty applicable to imported merchandise. The Act was silent about the tenure of the judges, as had been the Judiciary Act of 1789, c. 20, §§ 3, 4, 1 Stat. 73-75. The salary, first set at $10,000, was afterwards lowered to the $7,000 then being paid to circuit judges, Act of February 25, 1910, c. 62, § 1, 36 Stat. 202, 214, but before the first nominations had been received or confirmed, see 45 Cong. Rec. 2959, 4003 (1910); and, although it has since been increased, it has never been diminished. After the Bakelite case had been decided, Congress expressly conferred tenure during good behavior upon the court’s judges, in the Tariff Act of 1930, § 646, 46 Stat. 590, 762. Representative Chind-blom, in supporting the measure, stated that “when this court was established it was believed to be a constitutional court [so] that it was not necessary to fix the term.” 71 Cong. Rec. 2043 (1929).
  The debates in the Senate at the time of the court’s creation bear out this observation. See 44 Cong. Rec. 4185-4225 (1909). For under the Customs Administrative Act of 1890, c. 407, § 15, 26 Stat. 131, 138, review of decisions of the Board of General Appraisers had been vested in the Circuit Courts, undoubted Article III courts; it was this jurisdiction that was proposed to be transferred to the new court. The debates accordingly concerned themselves with whether there was a need for a specialized court in the federal judicial system to deal with customs matters.
  As was said some 35 years ago, “an important phase of the history of the federal judiciary deals with the movement for the establishment of tribunals whose business was to be limited to litigation arising from a restricted field of legislative control.” Frankfurter and Landis, The Business of the Supreme Court (1927), 147. In certain areas of federal judicial business there has been a felt need to obtain, first, the special competence in complex, technical and important matters that comes from narrowly focused inquiry; second, the speedy resolution of controversies available on a docket unencumbered by other matters; and, third, the certainty and definition that come from nationwide uniformity of decision. See generally id., at 146-186. Needs such as these provoked formation of the Commerce Court and the Emergency Court of Appeals. They also prompted establishment of the Court of Customs and Patent Appeals and its investiture with jurisdiction over customs, tariff, and patent and trademark litigation. 28 U. S. C. §§ 1541-1543.
  The parallelism with the Commerce Court is especially striking. That court was created to exercise the jurisdiction previously held by the Circuit Courts to review orders of the Interstate Commerce Commission. Mann-Elkins Act of June 18, 1910, c. 309, 36 Stat. 539. It was needed, so its sponsors believed, to afford uniform, expert, and expeditious judicial review. See President Taft’s message to Congress, 45 Cong. Rec. 379 (1910), in the course of which he stated:
  “Reasons precisely analogous to those which induced the Congress to create the court of customs appeals by the provisions in the tariff act of August 5, 1909, may be urged in support of the creation of the commerce court.”
  When disfavor with the court caused its abolition three years later, Act of October 22,1913, c. 32, 38 Stat. 208, 219, it was decided in Congress after extensive debate that the judges then serving on it were protected in tenure by Article III, and they were thereafter assigned to sit on other constitutional courts. See, e. g., 48 Cong. Rec. 7994 (1912) (remarks of Senator Sutherland); and see Donegan v. Dyson, 269 U. S. 49.
  The Emergency Court of Appeals was similarly created, by the Act of January 30, 1942, c. 26, 56 Stat. 23, to exercise exclusive equity jurisdiction to determine the validity of regulations, price schedules, and orders issued by the wartime Office of Price Administration. Its Article III status was recognized in Lockerty v. Phillips, 319 U. S. 182, 187-188.
  Of course the judges of those courts were appointed as judges of inferior federal courts generally, or drawn from among those previously appointed as such. See p. 538 and note 11, supra. But by 1942 at least, when the latter court was created, Congress was well aware of the doubt created by the Bakelite and Williams decisions whether Article III judges could sit on non-Article III tribunals. Its action in authorizing judges of the District Courts and Courts of Appeals to sit on the Emergency Court thus reflects its understanding that that court was being created under Article III.
  Such an understanding parallels that of previous Congresses since the adoption of the Constitution. Congress has never been compelled to vest the entire jurisdiction provided for in Article III upon inferior courts of its creation ; until 1875 it conferred very little of it indeed. See pp. 551-552, supra. The Court of Customs and Patent Appeals therefore fits harmoniously into the federal judicial system authorized by Article III.
  VII.
  Article III, § 2 provides in part:
  “The judicial Power shall extend to all Cases, in Law and Equity, arising under this Constitution, the Laws of the United States, and Treaties made, or which shall be made, under their Authority; . . .— to Controversies to which the United States shall be a Party . . .
  The cases heard by the Court of Claims and the Court of Customs and Patent Appeals all arise under federal law, as we have seen; they are also cases in which the United States is a party. But in Williams v. United States, 289 U. S. 553, 572-578, far from making of that circumstance a further proof that the Court of Claims exercises the judicial power contemplated by Article III, this Court held that it did not because that article, so it was said, does not make justiciable controversies to which the United States is a party defendant.
  The Court’s opinion dwelt in part upon the omission of the word “all” before “Controversies” in the clause referred to. To derive controlling significance from this semantic circumstance seems hardly to be faithful to John Marshall’s admonition that “it is a constitution we are expounding.” McCulloch v. Maryland, 4 Wheat. 316, 407. But it would be needlessly literal to suppose that the Court rested its holding on this point. Rather it deemed controlling the rule, “well settled and understood” at the time of the Constitutional Convention, that “the sovereign power is immune from suit.” 289 U. S., at 573. Accordingly it becomes necessary to reconsider whether that principle has the effect claimed of rendering suits against the United States non justiciable in a court created under Article III.
  At least one touchstone of justiciability to which this Court has frequently had reference is whether the action sought to be maintained is of a sort “recognized at the time of the Constitution to be traditionally within the power of courts in the English and American judicial systems.” United Steelworkers v. United States, 361 U. S. 39, 44, 60 (FRANKFURTER, J., concurring). There can be little doubt that that test is met here. Suits against the English sovereign by petition of liberate, monstrans de droit, and other forms of action designed to gain redress against unlawful action of the Crown had been developed over several centuries and were well-established before the Revolution. See 9 Holdsworth, History of English Law, 7-45 (1926). Similar provisions for judicial remedies against themselves were made by the American States immediately after the Revolution. E. g., 9 Laws of Ya. 536, 540 (1778) (Hening 1821); see Higginbotham’s Executrix v. Commonwealth, 25 Gratt. 627, 637-638 (Va. 1874). This history was known by Congress when it established the Court of Claims, see Cong. Globe, 33d Cong., 2d Sess. 73 (1854) (remarks of Senator Pettit), and undoubtedly was familiar to the Framers of the Constitution, most of them lawyers.
  Hamilton’s views, quoted in the Williams case, 289 U. S., at 576, are not to the contrary. To be sure, Hamilton argued that “the contracts between a nation and individuals are only binding on the conscience of the sovereign, and have no pretensions to a compulsive force. They confer no right of action, independent of the sovereign will.” The Federalist, No. 81 (Wright ed. 1961), at 511. But that is because there was no surrender of sovereign immunity in the plan of the convention; so that, for suits against the United States, it remained “inherent in the nature of sovereignty not to be amenable to the suit of an individual without its consent.” Ibid. (Emphasis in original.) In this sense, and only in this sense, is Article Ill’s extension of judicial competence over controversies to which the United States is a party ineffective to confer jurisdiction over suits to which it is a defendant. For “behind the words of the constitutional provisions are postulates which limit and control.” Monaco v. Mississippi, 292 U. S. 313, 322. But once the consent is given, the postulate is satisfied, and there remains no barrier to justiciability. Cf. Cohens v. Virginia, 6 Wheat. 264, 383-385.
  So the Court had given itself to understand before Williams was decided. In United States v. Louisiana, 123 U. S. 32, 35, it held maintainable under Article III a suit brought in the Court of Claims by a State against the United States with Congress’ consent. And in Minnesota v. Hitchcock, 185 U. S. 373, 384, which reaffirmed that ruling, the Court said:
  “This,is a controversy to which the United States may be regarded as a party. It is one, therefore, to which the judicial power of the United States extends. It is, of course, under that clause a matter of indifference whether the United States is a party plaintiff or defendant.”
  Further in the same opinion, 185 U. S., at 386, the Court significantly remarked:
  “While the United States as a government may not be sued without its consent, yet with its consent it may be sued, and the judicial power of the United States extends to such a controversy. Indeed, the whole jurisdiction of the Court of Claims rests upon this proposition.”
  To deny that proposition now would be to call into question a large measure of the jurisdiction exercised by the United States District Courts. Under the Federal Tort Claims Act, § 410 (a), 60 Stat. 842, 843-844 (1946), as amended, 28 U. S. C. § 1346 (b), those courts have been empowered to determine the tort liability of the United States in suits brought by individual plaintiffs. In so doing, they exercise functions akin to those of the Court of Claims, as is evidenced by the statutory authorization of appeals to that court from their judgments, with the consent of the appellee. § 412 (a)(2), 60 Stat. 844-845 (1946), as amended, 28 U. S. C. § 1504.
  In truth the District Courts have long been vested with substantial portions of the identical jurisdiction exercised by the Court of Claims. The Tucker Act, § 2, 24 Stat. 505 (1887), as amended, 28 U. S. C. § 1346 (a)(2), gives them concurrent jurisdiction over the suits it authorizes, when the amount in controversy is less than $10,000. Under that Act a District Court sits “as a court of claims,” United States v. Sherwood, 312 U. S. 584, 591, and affords the same rights and privileges to suitors against the United States. Bates Manufacturing Co. v. United States, 303 U. S. 567, 571. See generally Schwartz and Jacoby, Government Litigation (tentative ed. 1960), 109-111.
  There have been and are further statutory indications that Congress regards the two courts interchangeably. In 1921, Mr. Justice Brandéis compiled a list of 17 statutes passed during World War I, permitting suits against the United States for the value of property seized for use in the war effort, and authorizing them to be instituted in either the Court of Claims or one of the District Courts. United States v. Pfitsch, 256 U. S. 547, 553 n. 1. Today, 28 U. S. C. § 1500 gives litigants an election to sue the United States as principal in the Court of Claims or to pursue their claims against its agents in any other court, including the District Courts. See National Cored Forgings Co. v. United States, 132 Ct. Cl. 11, 132 F. Supp. 454. In addition, by the Act of September 13, 1960, §§ 1, 2 (a), 74 Stat. 912, Congress added §§ 1406 (c) and 1506 to Title 28 of the United States Code, providing for transfer between the Court of Claims and any District Court when a suit within one court’s exclusive jurisdiction is brought mistakenly in another.
  These evidences of congressional understanding that suits against the United States are justiciable in courts created under Article III may not be lightly disregarded. Nevertheless it is probably true that Congress devotes a more lively attention to the work performed by the Court of Claims, and that it has been more prone to modify the jurisdiction assigned to that court. It remains to consider whether that circumstance suffices to render nonjudicial the decision of claims against the United States in the Court of Claims.
  First. Throughout its history the Court of Claims has frequently been given jurisdiction by special act to award recovery for breach of what would have been, on the part of an individual, at most a moral obligation. E. g., 45 Stat. 602 (1928), as amended, 25 U. S. C. §§ 651 — 657; Indians of California v. United States, 98 Ct. Cl. 583, 599. Congress has waived the benefit of res judicata, Cherokee Nation v. United States, 270 U. S. 476, 486, and of defenses based on the passage of time, United States v. Alcea Band of Tillamooks, 329 U. S. 40, 45-46; United States v. Central Eureka Mining Co., 357 U. S. 155.
  In doing so, as this Court has uniformly held, Congress has enlisted the aid of judicial power whose exercise is amenable to appellate review here. United States v. Alcea Band of Tillamooks, supra; see Colgate v. United States, 280 U. S. 43, 47-48. Indeed the Court has held that Congress may for reasons adequate to itself confer bounties upon persons and, by consenting to suit, convert their moral claim into a legal one enforceable by litigation in an undoubted constitutional court. United States v. Realty Co., 163 U. S. 427.
  The issue was settled beyond peradventure in Pope v. United States, 323 U. S. 1. There the Court held that for Congress to direct the Court of Claims to entertain a claim theretofore barred for any legal reason from recovery — as, for instance, by the statute of limitations, or because the contract had been drafted to exclude such claims — was to invoke the use of judicial power, notwithstanding that the task might involve no more than computation of the sum due. Consent judgments, the Court recalled, are nonetheless judicial judgments. See 323 U. S., at 12, and cases cited. After this decision it cannot be doubted that when Congress transmutes a moral obligation into a legal one by specially consenting to suit, it authorizes the tribunal that hears the case to perform a judicial function.
  Second. Congress has on occasion withdrawn jurisdiction from the Court of Claims to proceed with the disposition of cases pending therein, and has been upheld in so doing by this Court. E. g., District of Columbia v. Eslin, 183 U. S. 62. But that is not incompatible with the possession of Article III judicial power by the tribunal affected. Congress has consistently with that article withdrawn the jurisdiction of this Court to proceed with a case then sub judice, Ex parte McCardle, 7 Wall. 506; its power can be no less when dealing with an inferior federal court, In re Hall, 167 U. S. 38, 42. For as Hamilton assured those of his contemporaries who were concerned about the reach of power that might be vested in a federal judiciary, “it ought to be recollected that the national legislature will have ample authority to make such exceptions, and to prescribe such regulations as will be calculated to obviate or remove [any] . . . inconveniences.” The Federalist, No. 80 (Wright ed. 1961), at 505.
  The authority is not, of course, unlimited. In 1870, Congress purported to withdraw jurisdiction from the Court of Claims and from this Court on appeal over cases seeking indemnification for property captured during the Civil War, so far as eligibility therefor might be predicated upon an amnesty awarded by the President, as both courts had previously held that it might. Despite Ex parte McCardle, supra, the Court refused to apply the statute to a case in which the claimant had already been adjudged entitled to recover by the Court of Claims, calling it an unconstitutional attempt to invade the judicial province by prescribing a rule of decision in a pending case. United States v. Klein, 13 Wall. 128. Surely no such concern would have been manifested if it had not been thought that the Court of Claims was invested with judicial power.
  VIII.
  A more substantial question relating to the justicia-bility of money claims against the United States arises from the impotence of a court to enforce its judgments. It was Chief Justice Taney’s opinion, in Gordon v. United States, afterwards published at 117 U. S. 697, 702, that the dependence of the Court of Claims upon an appropriation by Congress to carry its awards into effect negatived the possession of judicial power:
  “The award of execution is a part, and an essential part of every judgment passed by a court exercising judicial power.”
  But Taney’s opinion was not the opinion of the Court. It was a memorandum of his views prepared before his death and circulated among, but not adopted by, his brethren. The opinion of the Court, correctly reported for the first time in United States v. Jones, 119 U. S. 477, 478, makes clear that its refusal to entertain the Gordon appeal rested solely on the revisory authority vested in the Secretary of the Treasury before the repeal of § 14. See also United States v. Alire, 6 Wall. 573, 576; United States v. O’Grady, 22 Wall. 641, 647; Langford v. United States, 101 U. S. 341, 344-345 — in each of which the limitation of the Gordon decision to the difficulties caused by § 14 clearly appears.
  Nevertheless the problem remains and should be considered. Its scope has, however, been reduced by the Act of July 27, 1956, § 1302, 70 Stat. 678, 694, 31 U. S. C. § 724a, a general appropriation act w'hich eliminates the need for subsequent separate appropriations to pay judgments below 8100,000. A judgment creditor of this order simply files in the General Accounting Office a certificate of the judgment signed by the clerk and the chief judge of the Court of Claims, and is paid. 28 U. S. C. § 2517 (a). For judgments of this dimension, therefore, there need be no concern about the issuañce of execution.
  For claims in excess of $100,000, 28 U. S. C. § 2518 directs the Secretary of the Treasury to certify them to Congress once review in this Court has been foregone or sought and found unavailing. This, then, is the domain of our problem, for Art. I, § 9, cl. 7, vests exclusive responsibility for appropriations in Congress, and the Court early held that no execution may issue directed to the Secretary of the Treasury until such an appropriation has been made. Reeside v. Walker, 11 How. 272, 291.
  The problem was recognized in the Congress that created the Court of Claims, where it was pointed out that if ability to enforce judgments were made a criterion of judicial power, no tribunal created under Article III would be able to assume jurisdiction of money claims against the United States. Cong. Globe, 33d Cong., 2d Sess. 113 (1854) (remarks of Senator Stuart). The subsequent vesting of such jurisdiction in the District Courts, pp. 565-566, supra, of course bears witness that at least the Congress has not thought such a criterion imperative.
  Ever since Congress first accorded finality to judgments of the Court of Claims, it has sought to avoid interfering with their collection. Section 7 of the Act of March 3, 1863, 12 Stat. 765, 766, provided for the payment of final judgments out of general appropriations. In 1877, Congress shifted for a time to appropriating lump sums for judgments certified to it by the Secretary of the Treasury, not in order to question the judgments but to avoid the possibility that a large judgment might exhaust the prior appropriation. Act of March 3, 1877, c. 105, 19 Stat. 344, 347; see 6 Cong. Rec. 585-588 (1877). A study:concluded in 1933 found only 15 instances in 70 years when Congress had refused to pay a judgment. Note, 46 Harv. L. Rev. 677, 685-686 n. 63. This historical record, surely more favorable to prevailing parties than that obtaining in private litigation, may well make us doubt whether the capacity to enforce a judgment is always indispensable for the exercise of judicial power.
  The Court did not think so in La Abra Silver Mining Co. v. United States, 175 U. S. 423, 461-462, where the issue was the justiciability under Article III of a declaratory judgment action brought by the United States in the Court of Claims to determine its liability for payment of an award procured by the defendant from an international arbitral commission assertedly through fraud. See also Nashville, C. & St. L. R. Co. v. Wallace, 288 U. S. 249, 263. Nor has it thought so when faced with the exactly analogous problem presented by suits for money between States in the original jurisdiction. That jurisdiction has been upheld, for example, in South Dakota v. North Carolina, 192 U. S. 286, 318-321, notwithstanding
  the Court's recognition of judicial impotence to compel a levy of taxes or otherwise by process to enforce its award. See especially the opinions of Chief Justice Fuller and Chief Justice White at the beginning and inconclusive end of the extended litigation between Virginia and West Virginia, 206 U. S. 290, 319 (1907) and 246 U. S. 565 (1918), in which the Court asserted jurisdiction to award damages for breach of contract despite persistent and never-surmounted challenges to its power to enforce a decree. If this Court may rely on the good faith of state governments or other public bodies to respond to its judgments, there seems to be no sound reason why the Court of Claims may not rely on the good faith of the United States. We conclude that the presence of the United States as a party defendant to suits maintained in the Court of Claims and the Court of Customs and Patent Appeals does not debar those courts from exercising the judicial power provided for in Article III.
  IX.
  All of the business that comes before the two courts is susceptible of disposition in a judicial manner. What remains to be determined is the extent to which it is in fact disposed of in that manner.'
  A preliminary consideration that need not detain us long is the absence of provision for jury trial of counterclaims by the Government in actions before the Court of Claims. Despite dictum to the contrary in United States v. Sherwood, 312 U. S. 584, 587, the legitimacy of that non jury mode of trial does not depend upon the supposed “legislative” character of the court. It derives instead, as indeed was also noted in Sherwood, ibid., from the fact that suits against the Government, requiring as they do a legislative waiver of immunity, are not “suits at common law” within the meaning of the Seventh Amendment. McElrath v. United States, 102 U. S. 426, 439-440. The Congress was not, therefore, required to provide jury trials for plaintiffs suing in the Court of Claims; the reasonableness of its later decision to obviate the need for multiple litigation precludes a finding that its imposition of amenability to nonjury set-offs was an unconstitutional condition. Cf. Minneapolis & St. L. R. Co. v. Bombolis, 241 U. S. 211; see 74 Harv. L. Rev. 414, 415 (I960)."
  The principal question raised by the parties under this head of the argument is whether the matters referred by Congress to the Court of Claims and the Court of Customs and Patent Appeals are submitted to them in a form consonant with the limitation of judicial power to “cases or controversies” imposed by Article III. We may consider first the bulk of jurisdiction exercised by the two courts, reserving for separate treatment in the next section of this opinion two areas which may reasonably be regarded as presenting special difficulty.
  “Whether a proceeding which results in a grant is a judicial one,” said Mr. Justice Brandéis for a unanimous Court, “does not depend upon the nature of the thing granted, but upon the nature of the proceeding which Congress has provided for securing the grant. The United States may create rights in individuals against itself and provide only an administrative remedy. It may provide a legal remedy, but make resort to the courts available only after all administrative remedies have been exhausted. It may give to the individual the option of either an administrative or a legal remedy. Or it may provide only a legal remedy. [See pp. 549-552, supra.] Whenever the law provides a remedy enforceable in the courts according to the regular course of legal procedure, and that remedy is pursued, there arises a case within the meaning of the Constitution, whether the subject of the litigation be property or status.” Tutun v. United States, 270 U. S. 568, 576-577. (Citations omitted.)
  It is unquestioned that the Tucker Act cases assigned to the Court of Claims, 28 U. S. C. § 1491, advance to judgment “according to the regular course of legal procedure.” Under this grant of jurisdiction the court hears tax cases, cases calling into question the statutory authority for a regulation, controversies over the existence or extent of a contractual obligation, and the like. See generally Schwartz and Jacoby, Government Litigation (tentative ed. 1960), 131-223. Such cases, which account for as much as 95 fc of the court’s work, form the staple judicial fare of the regular federal courts. There can be no doubt that, to the “expert- feel of lawyers,” United Steelworkers v. United States, 361 U. S. 39, 44, 60 (Frankfurter, J., concurring), they constitute cases or controversies.
  The balance of the court’s jurisdiction to render final judgments may likewise be assimilated to the traditional business of courts generally. Thus the court has been empowered to render accountings, to decide if debts or penalties are due the United States, and to determine the liability of the United States for patent or copyright infringement and for other specially designated torts. In addition, it has been given jurisdiction to review, on issues of law including the existence of substantial evidence, decisions of the Indian Claims Commission. Each of these cases, like those under the Tucker Act, is contested, is concrete, and admits of a decree of a sufficiently conclusive character. See Aetna Life Insurance Co. v. Haworth, 300 U. S. 227, 240-241.
  The same may undoubtedly be said of the customs jurisdiction vested in the Court of Customs and Patent Appeals by 28 U. S. C. § 1541. Contests over classification and valuation of imported merchandise have long-been maintainable in inferior federal courts. Under R. S. § 3011 (1878), suits after protest against the collector were authorized in the circuit courts. E. g., Greely's Administrator v. Burgess, 18 How. 413; Iasigi v. The Collector, 1 Wall. 375. When the Customs Administrative Act of 1890 was passed, c. 407, 26 Stat. 131, repealing that section and creating a Board of General Appraisers to review determinations of the collector, a further right of review was provided in the Circuit Courts. See De Lima v. Bidwell, 182 U. S. 1, 175. This Court took unquestioned appellate jurisdiction from those courts on numerous occasions. E. g., United States v. Ballin, 144 U. S. 1; Hoeninghaus v. United States, 172 U. S. 622. It has continued to accept review by certiorari from the Court of Customs Appeals since the jurisdiction of the Circuit Courts was transferred to it in 1909. E. g., Five Per Cent. Discount Cases, 243 U. S. 97; Barr v. United States, 324 U. S. 83. That the customs litigation authorized by § 1541 confonns to conventional notions of case or controversy seems no longer open to doubt.
  Doubt has been expressed, however, about the jurisdiction conferred by 28 U. S. C. § 1542 and 60 Stat. 435 (1946), as amended, 15 IT. S. C. § 1071, to review application and interference proceedings in the Patent Office relative to patents and trademarks. Parties to those proceedings are given an election to bring a civil action to contest the Patent Office decision in a District Court under 35 U. S. C. §§ 145, 146, or to seek review- in the Court of Customs and Patent Appeals under 35 U. S. C. § 141. If the latter choice is made, the Court confines its review to the evidence adduced before the Patent Office and to the questions of law preserved1 by the parties; its decision “shall be entered of record in the Patent Office and govern the further proceedings in the case.” 35 U. S. C. § 144. The codification “omitted as superfluous” the last sentence in the existing statute: “But no opinion or decision of the court in any such case shall preclude any person interested from the right to contest the validity of such patent in any court wherein the same may be called in question.” Act of July 8,1870, c. 230, § 50, 16 Stat. 198, 205; see Reviser’s Note to 35 U. S. C. § 144.
  The latter provision was evidently instrumental in prompting a decision of this Court, at a time when review of Patent Office determinations was vested in the Court of Appeals for the District of Columbia, that the ruling called for by the statute was not of a judicial character. Postura Cereal Co. v. California Fig Nut Co., 272 U. S. 693, 699. That is the most that the Postura holding can be taken to stand for, as United States v. Duell, 172 U. S. 576, 588-589, had upheld the judicial nature of the review in all other respects. And the continuing vitality of the decision even to this extent has been seriously weakened if not extinguished by the subsequent holding in Hoover Co. v. Coe, 325 U. S. 79, 88, sustaining the justiciability of the alternative remedy by civil action even though the Court deemed “the effect of adjudication in equity the same as that of decision on appeal.” See Kurland and Wolfson, Supreme Court Review of the Court of Customs and Patent Appeals: Patent Office and Tariff Commission Cases, 18 G. W. L. Rev. 192, 194^198 (1950).
  At the time when Posturn was decided, the proceeding in equity against the Patent Office was cumulative rather than alternative with the review by appeal, and it seems likely that it was this feature of the statute which caused the Court to characterize the judgment of the Court of Appeals as “a mere administrative decision.” 272 U. S., at 698. Thereafter Congress made the remedies alternative, Act of March 2,1927, c. 273, § 11, 44 Stat. 1335, 1336, and it was this amended jurisdiction that it later transferred to the Court of Customs and Patent Appeals, renaming the court in the process. Act of March 2, 1929, c. 488, 45 Stat. 1475.
  It may still be true that Congress has given to the equity proceeding a greater preclusive effect than that accorded to decisions of the Court of Customs and Patent Appeals. Even so, that circumstance alone is insufficient to make those decisions non judicial. Tutun v. United States, 270 U. S. 568, decided by the same Court as Posturn and not there questioned, is controlling authority. For the Court there held that a naturalization proceeding in a Federal District Court was a “case” within the meaning of Article III, even though the Government was empowered by statute to bring a later bill in equity for cancellation of the certificate.
  Mr. Justice Brandéis, the author of the Tutun opinion, had also prepared the Court’s opinion in United States v. Ness, 245 U. S. 319, which upheld the Government’s right to seek denaturalization even upon grounds known to and asserted unsuccessfully by it in the naturalization court. Proceedings in that court, the opinion explained, were relatively summary, with no right of appeal, whereas the denaturalization suit was plenary enough to permit full presentation of all objections and was accompanied with appeal as of right. 245 U. S., at 326. These differences made it reasonable for Congress to allow the Government another chance to contest the applicant’s eligibility.
  The decision in Tutun, coming after Ness, draws the patent and trademark jurisdiction now exercised by the Court of Customs and Patent Appeals fully within the category of cases or controversies. So much was recognized in Tutun itself, 270 U. S., at 578, where Mr. Justice Brandéis observed:
  “If a certificate is procured when the prescribed qualifications have no existence in fact, it may be cancelled by suit. ‘It is in this respect,’ as stated in Johannessen v. United States, 225 U. S. 227, 238, ‘closely analogous to a public grant of land (Rev. Stat., § 2289, etc.,) or of the exclusive right to make, use and vend a new and useful invention (Rev. Stat., §4883, etc.).”’ (Emphasis added.)
  Like naturalization proceedings in a District Court, appeals from Patent Office decisions under 35 U. S. C. § 144 are relatively summary — since the record is limited to the evidence allowed by that office — and are not themselves subject to direct review by appeal as of right. It was as reasonable for Congress, therefore, to bind only the Patent Office on appeals and to give private parties whether or not participants in such appeals a further opportunity to contest the matter on plenary records developed in litigation elsewhere. This practice but furnishes a further illustration of the specialized jurisdiction of the Court of Customs and Patent Appeals, akin to that of the Commerce Court, in passing upon the consistency with law of expert administrative judgments without undertaking to conclude private parties in nonadministrative litigation. We conclude that the Postura decision must be taken to be limited to the statutory scheme in existence before the transfer of patent and trademark litigation to that court.
  X.
  We turn finally to the more difficult questions raised by the jurisdiction vested in the Court of Customs and Patent Appeals by 28 U. S. C. § 1543 to review Tariff Commission findings of unfair practices in import trade, and the congressional reference jurisdiction given the Court of Claims by 28 U. S. C. §§ 1492 and 2509. The judicial quality of the former was called into question though not resolved in Ex parte Bakelite Corp., 279 U. S. 438, 460-461, while that of the latter must be taken to have been adversely decided, so far as susceptibility to Supreme Court review is concerned, by In re Sanborn, 148 U. S. 222.
  At the outset we are met with a suggestion by the Solicitor General that even if the decisions called for by these heads of jurisdiction are non judicial, their compatibility with the status of an Article III court has been settled by O’Donoghue v. United States, 289 U. S. 516, 545-548. It is true that O’Donoghue upheld the authority of Congress to invest the federal .courts for the District of Columbia with certain administrative responsibilities — such as that of revising the rates of public utilities 2 — but only such as were related to the government of the District. See Pitts v. Peak, 60 App. D. C. 195, 197, 50 F. 2d 485, 487, cited and relied upon in O’Donoghue, 289 U. S., at 547-548. To extend that holding to the wholly nationwide jurisdiction of courts whose seat is in the District of Columbia would be to ignore the special importance attached in the O’Donoghue opinion to the need there for an independent national judiciary.
  The restraints of federalism are, of course, removed from the powers exercisable by Congress within the District. For, as the Court early stated, in Kendall v. United States, 12 Pet. 524, 619:
  “There is in this district, no division of powers between the general and state governments. Congress has the entire control over the district for every purpose of government; and it is reasonable to suppose, that in organizing a judicial department here, all judicial power necessary for the purposes of government would be vested in the courts of justice.”
  Thus those limitations implicit in the rubric “case or controversy” that spring from the Framers’ anxiety not to intrude unduly upon the general jurisdiction of state courts, see Madison’s Notes of the Debates, in II Farrand, Records of the Federal Convention (1911), 45-46, need have no application in the District. The national courts here may, consistently with those limitations, perform any of the local functions elsewhere performed by state courts.
  But those are not the only limitations embodied in Article Ill’s restriction of judicial power to cases or controversies. The restriction expresses as well the Framers’ desire to safeguard the independence of the judicial from the other branches by confining its activities to “cases of a Judiciary nature,” see II Farrand, op cit., supra, at 430, and in this respect it remains fully applicable at least to courts invested with jurisdiction solely over matters of national import. Our question is whether the independence of either the Court of Claims or the Court of Customs and Patent Appeals has been so compromised by its investiture with the particular heads of jurisdiction described above as to destroy its eligibility for recognition as an Article III court.
  The jurisdictional statutes in issue, § 337 of the Tariff Act of 1930 and 28 U. S. C. §§ 1492, 2509, appear to subject the decisions called for from those courts to an extrajudicial revisory authority incompatible with the limitations upon judicial power this Court has drawn from Article III. See, e. g., Chicago & Southern Air Lines, Inc., v. Waterman S. S. Corp., 333 U. S. 103, 113-114; Hayburn’s Case, 2 Dall. 409. Whether they actually do so is not, however, entirely free from difficulty, and cannot in our view appropriately be decided in a vacuum, apart from the setting of particular cases in which we may gauge the operation of the statutes. For disposition of the present cases, we think it is sufficient simply to note the doubt attending the validity of the jurisdiction, and to proceed on the assumption that it cannot be entertained by an Article III court.
  It does not follow, however, from the invalidity, actual or potential, of these heads of jurisdiction, that either the Court of Claims or the Court of Customs and Patent Appeals must relinquish entitlement to recognition as an Article III court. They are not tribunals, as are for example the Interstate Commerce Commission or the Federal Trade Commission, a substantial and integral part of whose business is non judicial.
  The overwhelming majority of the Court of Claims’ business is composed of cases and controversies. See pp. 573-574, supra. In the past year, it heard only 10 reference cases, Annual Report of the Administrative Office of the United States Courts (1961), 318; and its recent annual average has not exceeded that figure, Pavenstedt, The United States Court of Claims as a Forum for Tax Cases, 15 Tax L. Rev. 1, 6 n. 23 (1959). The tariff jurisdiction of the Court of Customs and Patent Appeals is of even less significant dimensions. In the past fiscal year, that court disposed of 41 customs cases and 112 patent or trademark cases, but heard no appeals from the Tariff Commission. Annual Report of the Administrative Office of the United States Courts (1961), 318. Indeed we are advised that in all the years since 1922, when the predecessor to § 337 of the Tariff Act was first enacted, the Court of Customs and Patent Appeals has entertained only six such cases. Certainly the status of a District Court or Court of Appeals would not be altered by a mere congressional attempt to invest it with such insignificant non judicial business; it would be equally perverse to make the status of these courts turn upon so minuscule a portion of their purported functions.
  The Congress that enacted the assignment statute with its accompanying declarations was apprised of the possibility that a re-examination of the Bakelite and Williams decisions might lead to disallowance of some of these courts’ jurisdiction. See 99 Cong. Rec. 8944 (1953) (remarks of Senator Gore); 104 Cong. Rec. 17549 (1958) (remarks of Senator Talmadge). Nevertheless it chose to pass the statute. We think with it that, if necessary, the particular offensive jurisdiction, and not the courts, would fall.
  Conclusions.
  Since the Court of Claims and the Court of Customs and Patent Appeals are courts created under Article III, their judges — including retired judges, Booth v. United States, 291 U. S. 339, 350-351 — are and have been constitutionally protected in tenure and compensation. Our conclusion, it should be noted, is not an ex post facto resurrection of a banished independence. The judges of these two courts have never accepted the dependent status thrust at them by the Bakelite and Williams decisions. See, e. g., Judge Madden writing for the Court of Claims in Pope v. United States, 100 Ct. Cl. 375, 53 F. Supp. 570, rev’d, 323 U. S. 1. The factors set out at length in this opinion, which were not considered in the Bakelite and Williams opinions, make plain that the differing conclusion we now reach does no more than confer legal recognition upon an independence long exercised in fact.
  That recognition suffices to dispose of the present cases. For it can hardly be contended that the specialized functions of these judges deprive them of capacity, as a matter of due process of law, to sit in judgment upon the staple business of the District Courts and Courts of Appeals. Whether they should be given such assignments may be and has been a proper subject for congressional debate, e. g., 62 Cong. Rec. 190-191, 207-209 (1921) , but once legislatively resolved it can scarcely rise to the dignity of a constitutional question. To be sure, a judge of specialized experience may at first need to devote extra time and energy to familiarize himself with criminal, labor relations, or other cases beyond his accustomed ken. But to elevate this temporary disadvantage into a constitutional disability would be tantamount to suggesting that the President may never appoint to the bench a lawyer whose life’s practice may have been devoted to patent, tax, antitrust, or any other specialized field of law in which many eminently well-qualified lawyers are wont to engage. The proposition will not, of course, survive its statement.
  The judgments of the Courts of Appeals are
  Affirmed.
  Mr. Justice Frankfurter took no part in the decision of this case.
  Mr. Justice White took no part in the consideration or decision of this case.
  Act of July 28, 1953, § 1, 67 Stat. 226, added to 28 U. S. C. § 171 (Court of Claims); Act of August 25, 1958, § 1, 72 Stat. 848, added to 28 U. S. C. § 211 (Court of Customs and Patent Appeals). See also Act of July 14, 1956, § 1, 70 Stat. 532, added to 28 U. S. C. § 251 (Customs Court).
  “The Chief Justice of the United States may designate and assign temporarily any judge of the Court of Claims or the Court of Customs and Patent Appeals ... to perform judicial duties in any circuit, either in a court of appeals or district court, upon presentation of a certificate of necessity by the chief judge or circuit justice of the circuit wherein the need arises.”
  28 U. S. C. § 294 (d) authorizes assignment of a retired judge from either court to “perform such judicial duties as he is willing and able to undertake” in any circuit.
  The petition in No. 481 sought certiorari only as to that issue.
  10 Stat. 612 (1855), as amended, 28 U. S. C. § 173 (Court of Claims); 46 Stat. 590, 762 (1930), as amended, 28 U. S. C. §213 (Court of Customs and Patent Appeals). Judge Madden was appointed in 1941, Brief for Petitioner in No. 242, pp. 7-8, and retired in 1961, 290 F. 2d xvi; Judge Jackson was appointed in 1937, Brief for Petitioner in No. 481, pp. 9-10, and retired in 1952, 193 F. 2d xv.
  The bearing of § 2 of Art. Ill on petitioners’ claims is discussed later. Infra, pp. 562-583.
  The abstractness of the present controversy is graphically demonstrated by the disparity in volume between records and briefs. The records in both cases amount to but 66 pages of motions, opinions, and the like, with no relevant transcripts of proceedings, while the briefs extend to 533 pages exclusive of appendices.
  Under our limited writ of certiorari, 368 U. S. 814, we have no occasion to consider whether federal law was more appropriately the measure of the employer’s obligation. Cf. Teamsters Local 174 v. Lucas Flour Co., 369 U. S. 95.
  The debates and reports in Congress display no awareness of the problem. See H. R. Rep. No. 1152, 67th Cong., 2d Sess. (1922); 62 Cong. Ree. 190-191, 207-209 (1921). -
  Article II, § 2, cl. 2 of the Constitution provides that the President
  “. . . shall nominate, and by and with the Advice and Consent of the Senate, shall appoint Ambassadors, other public Ministers and Consuls, Judges of the supreme Court, and all other Officers of the United States, whose Appointments are not herein otherwise provided for, and w'hieh shall be established by Law: but the Congress may by Law vest the Appointment of such inferior Officers, as they think proper, in the President alone, in the Courts of Law, or in the Heads of Departments.”
  Compare the statute creating the Emergency Court of Appeals, to consist of three or more judges “designated by the Chief Justice of the United States from judges of the United States district courts and circuit courts of appeals.” Act of January 30, 1942, c. 26, §204 (c), 56 Stat. 23, 32.
  Hearings on H. R. 1070 before Subcommittee No. 2 of the House Committee on the Judiciary, pp. 6-7, 24 (Unpublished, May 19, 1953; on file with the Clerk of the Committee) (testimony of Judge Howell of the Court of Claims); H. R. Rep. No. 695, 83d Cong., 1st Sess. 2, 5-6 (1953); S. Rep. No. 275, 83d Cong., 1st Sess. 2 (1953); H. R. Rep. No. 2349, 85th Cong., 2d Sess. (1958); S. Rep. No. 2309, 85th Cong., 2d Sess. (1958); 104 Cong. Rec. 16095 (1958) (remarks of Representative Keating).
  Far from being “incapable of receiving” federal-question jurisdiction, the territorial courts have long exercised a jurisdiction commensurate in this regard with that of the regular federal courts and have been subjected to the appellate jurisdiction of this Court precisely because they do so. Benner v. Porter, 9 How. 235, 243; Clinton v. Englebrecht, 13 Wall. 434, 447; Reynolds v. United States, 98 U. S. 145, 154; United States v. Coe, 155 U. S. 76, 86; Balzac v. Porto Rico, 258 U. S. 298, 312-313; International Longshoremen’s Union v. Juneau Spruce Corp., 342 U. S. 237, 240-241; cf. Martin v. Hunter’s Lessee, 1 Wheat. 304, 338; see Pope v. United States, 323 U. S. 1, 13-14.
  Under Barber v. Barber, 21 How. 582, 584, for example, the federal courts in the States were incompetent to render divorces; but in the territories, where the legislative power of the United States of necessity extended to all such local matters, the territorial courts took cognizance of them. Simms v. Simms, 175 U. S. 162, 167-168; De la Rama v. De la Rama, 201 U. S. 303.
  Benner v. Porter, 9 How. 235, 240, 244. For statutory techniques since developed to avoid the interregnal problems involved in that case, see Metlakatla Indian Community v. Egan, 363 U. S. 555, 557-559; 1 Moore, Federal Practice (2d ed. 1961), 32-34.
  See Clinton v. Englebrecht, 13 Wall. 434, 441-445; Hornbuckle v. Toombs, 18 Wall. 648, 655-656.
  Compare Clinton v. Englebrecht, supra, 13 Wall., at 446, 447, with Dreyer v. Illinois, 187 U. S. 71, 83-84.
  See generally, as to each of these courts, 1 Moore, Federal Practice (2d ed. 1961), 40-44, 47-50.
  We do not now decide, of course, whether the same conditions still obtain in each of the present-day territories or whether, even if they do, Congress might not choose to establish an Article III court in one or more of them.
  Ex parte Bakelite Corp., 279 U. S. 438, 453, 458; accord, Williams v. United States, 289 U. S. 553, 579.
  Williams itself recognized that the jurisdiction conferred on the Court of Claims by the Tucker Act, now 28 U. S. C. § 1491, to award just compensation for a governmental taking, empowered that court to decide what had previously been described as a judicial and not a legislative question. 289 U. S., at 581; see, e. g., Monongahela Navigation Co. v. United States, 148 U. S. 312, 327. As for Bakelite, its reliance, 279 U. S., at 458 n. 26, on Cary v. Curtis, 3 How. 236, for the proposition that disputes over customs duties may be adjudged summarily without recourse to judicial proceedings, appears to have overlooked the care with which that decision specifically declined to rule whether all right of action might be taken away from a protestant, even going so far as to suggest several judicial remedies that might have been available. See 3 How., at 250.
  2 79 U. S., at 451 n. 8; 289 U. S., at 579.
  18 How., at 284.
  But see note 21, supra.
  See generally Hart and Wechsler, The Federal Courts and the Federal System (1953), 312-340, and more specifically, pp. 567-568, infra.
  § 3, 12 Stat. 765, now 28 U. S. C. § 1503. See also 18 Stat. 481 (1875), as amended, 31 U. S. C. §227, requiring the Comptroller General to bring suit against a nonconsenting judgment creditor if that official believes a debt not previously asserted as a set-off is due the United States.
  22 Wall., at 648.
  Evans v. Gore, 253 U. S. 245, 248-254.
  Under the Legislative Appropriation Act of June 30, 1932, c. 314, 47 Stat. 382 — the statute under which the Williams and O’Donoghue cases arose — the judges of the Court of Customs and Patent Appeals accepted a reduction in salary from $12,500 to $10,000. That court had not, however, been specified for reduction by Congress; the action of the judges was understandable coming as it did after Bakelite had been decided; and under § 109 of the Act, 47 Stat. 403, the Treasury was authorized to accept reductions in payment voluntarily tendered by judges whose salary was constitutionally exempt from diminution.
  36 Stat. 106. Provision was made for the transfer of pending cases and of appeals from final decisions in and of the Circuit Courts and Courts of Appeals. 36 Stat. 106, 107. The very first case heard by the Court of Customs Appeals was an appeal from the Circuit Court for the Southern District of New York in Hansen v. United States, 1 Ct. Cust. App. 1; it also took jurisdiction of a case transferred from the Court of Appeals for the Ninth Circuit in United States v. Seattle Brewing & Malting Co., 1 Ct. Cust. App. 362.
  Its functions were continued under the Defense Production Act of 1950, c. 932, § 408, 64 Stat. 798, 808, to determine the validity of price and wage stabilization orders issued under that Act. On April 18, 1962, after denial of certiorari in the last ease on its docket, Rosenzweig v. Boutin, 369 U. S. 818, the court terminated its existence. 299 F. 2d 1-21.
  As there was, for example, in suits between States and by the United States against a State. Rhode Island v. Massachusetts, 12 Pet. 657, 720; United States v. Texas, 143 U. S. 621, 639-646.
  Pocono Pines Assembly Hotels Co. v. United States, 73 Ct. Cl. 447, leave to file 'petition for writ of mandamus or prohibition denied, 285 TJ. S. 526, in which the Congress “remanded” a final and unap-pealed decision against the United States to the Court of Claims for new findings, does not detract from the authority of Klein. Without examining anything else, it is enough to note that the considerations governing a grant or denial of a petition for mandamus are, like those controlling the issuance of a writ of certiorari, so discretionary with the Court as to deprive a denial of precedential effect on this score. Compare Sup. Ct. Rule 30 with Rule 19 (1), (2), and cf. Brown v. Allen, 344 U. S. 443, 488, 491-492 (opinion of FRANKFURTER, J.).
  “No Money shall be drawn from'the Treasury, but in Consequence of Appropriations made by Law . . .
  See also the intervening opinions and dispositions: 209 U. S. 514; 220 U. S. 1, 36; 222 U. S. 17, 19-20; 231 U. S. 89; 234 U. S. 117; 238 U. S. 202; 241 U. S. 531.
  The provision in 28 U. S. C. § 2503 for Commissioners to take evidence and make preliminary rulings is conformable in all respects with the practice of masters in chancery. For the judicial quality of the proceedings, see the Revised Rules of the Court of Claims, effective December 2, 1957, 140 Ct. Cl. II, 28 U. S. C. App., p. 5237, as amended, id. (Supp. Ill), p. 863.
  In 1950, Tucker Act cases constituted 2,350 of the 2,472 proceedings conducted by the court. Wilkinson, The United States Court of Claims, 36 A. B. A. J. 89, 159 (1950). The percentage may well have been augmented since that time by the. extension of Tucker Act jurisdiction to Indian claims accruing after August 13, 1940. 28 U. S. C. § 1505, added by 63 Stat. 102 (1949).
  28 U. S. C. § 1494 (contractors or their sureties); 28 U. S. C. §§ 1496, 2512 (disbursing officers).
  R. S. § 5261 (1S78), as amended, 45 U. S. C. § 87 (government-aided railroads).
  X.T. S. C. § 1499 (violations of the Eight-Hour Law, 37 Stat. 137 (1912), as amended, 40 U. S. C. § 324).
  28 U. S. C. (Supp. Ill) § 1498.
  28 U. S. C. §§ 1495, 2513 (wrongful imprisonment): 28 U. S. C. § 1497 (trespass to oyster beds).
  60 Stat. 1049, 1054 (1946), 25 U. S. C. § 70s.
  42 Stat. 15 (1921), as amended, 19 U. S. C. §169, makes 28 IJ. S. C. § 1541 applicable as well to the antidumping statute. See also 46 Stat. 735 (1930), as amended, 19 U. S. C. § 1516 (b), (c), permitting classification or valuation cases to be initiated by protest from a competing domestic manufacturer, after which the importer’s consignee may be made a party to suit in the Customs Court, with appeal to the Court of Customs and Patent Appeals.
  Curiously, Duell was not cited in Postum, while the cases that were — Frasch v. Moore, 211 U. S. 1; Atkins v. Moore, 212 U. S. 285; Baldwin Co. v. Howard Co., 256 U. S. 35 — had, as the Court recognized, held only that the statutory scheme of review did not produce a “final judgment” as required by the statute then governing appeals to the Court.
  See Stern and Gressman, Supreme Court Practice (1950), 44-46. But see Hobart Mfg. Co. v. Landers, Frary & Clark, 26 F. Supp. 198, 202, aff’d per curiam, 107 F. 2d 1016; Battery Patents Corp. v. Chicago Cycle Supply Co., 111 F. 2d 861, 863; Reviser’s Note, 35 U. S. C. § 144.
  Naturalization Act of June 29, 1906, c. 3592, § 15, 34 Stat. 596, 601.
  For later developments, see Schneiderman v. United States, 320 U. S. 118, 123-125; Knauer v. United States, 328 U. S. 654, 671-673; Chaunt v. United States, 364 U. S. 350.
  We intimate no opinion whether 28 U. S. C. § 1256 was intended by Congress to make patent and trademark cases reviewable by certiorari in this Court. See Kurland and Wolfson, Supreme Court Review of the Court of Customs and Patent Appeals, 18 G. W. L. Rev. 192, 194-198 (1950).
  Section 316 (c) of the Tariff Act of 1922, c. 356, 42 Stat. 858, 943, involved in Bakelite, was reenacted in virtually identical terms by § 337 (c) of the Tariff Act of 1930, 46 Stat. 590, 703, as amended, 19 U. S. C. § 1337 (c).
  Sanborn involved the departmental reference jurisdiction of the Court of Claims, since repealed by 67 Stat. 226 (1953); but the functions performed by the court in that case were not in substance different from those it still performs on request by Congress.
  See Keller v. Potomac Electric Power Co., 261 U. S. 428.
  Federal Radio Comm’n v. General Electric Co., 281 U. S. 464, which sustained the authority of the Court of Appeals for the District of Columbia to render an “administrative” decision respecting the issuance of a radio broadcasting license to a station in Schenectady, New York, was decided at a time when the courts of the District were regarded wholly as legislative courts. Id., at 468.
  It is significant that all of the jurisdiction at issue in the Keller, Postum, and General Electric cases has long since been transformed into judicial business. The change with respect to review of Patent Office decisions took place, as we have seen, p. 577, supra, before the transfer of that jurisdiction to the Court of Customs and Patent Appeals. Review of the Public Utilities Commission was restricted to questions of law upon the evidence before the Commission, in the Act of August 27, 1935, § 2, 49 Stat. 882, D. C. Code, 1961, § 43-705. See Public Utilities Comm’n v. Pollak, 343 U. S. 451, 458. And the Act of July 1, 1930, c. 788, 46 Stat. 844, likewise made review of the Radio Commission judicial, as was recognized in Federal Radio Comm’n v. Nelson Bros. Co., 289 U. S. 266, 274r-278.
  The D. C. Code, 1961, Tit. 11, c. 5, establishes a special term of the United States District Court as a probate court, whereas the other Federal District Courts have been debarred from exercising such a jurisdiction as one traditionally within the domain of the States. Byers v. McAuley, 149 U. S. 608, 619. Similarly, the divorce proceedings maintainable under the general jurisdictional grant, D. C. Code, § 11-306; see Bottomley v. Bottomley, 104 U. S. App. D. C. 311, 262 F. 2d 23, are beyond the ken of the federal courts in the States. Ohio ex rel. Popovici v. Agler, 280 U. S. 379, 383.
  The appointing authority given judges of the District Court to select members of the Board of Education and of the Commission on Mental Health, D. C. Code, §§ 31-101, 21-308, is probably traceable to Art. II, § 2 of the Constitution. See note 10, supra; Ex parte Siebold, 100 U. S. 371, 397-398.
  Brief on behalf of the chief judge and the associate judges of the United States Court of Customs and Patent Appeals as amici curiae, p. 10.