opinion: Mr. Justice Powell
  delivered the opinion of the Court.
  The issue in this case concerns the scope of judicial review of the Attorney General’s failure to interpose a timely objection under § 5 of the Voting Rights Act of 1965 to a change in the voting laws of a jurisdiction subject to that Act.
  I
  The events leading up to this litigation date back to November 11, 1971, when South Carolina enacted Act 932 reapportioning the State Senate. South Carolina promptly submitted Act 932 to the Attorney General of the United States for preclearance review pursuant to § 5 of the Voting Rights Act. 79 Stat. 439, as amended, 42 U. S. C. § 1973c (1970 ed., Supp. V). That section forbids States subject to the Act to implement any change in “any voting qualification or prerequisite to voting, or standard, practice, or procedure with respect to voting” without first (i) obtaining a declaratory judgment from the District Court for the District of Columbia that the proposed change “does not have the purpose and will not have the effect of denying or abridging the right to vote on account of race or color,” or (ii) submitting the change to the Attorney General and receiving no objection within 60 days. While the Attorney General had Act 932 under review, several suits were filed in the United States District Court for the District of South Carolina challenging that Act as violative of the Fourteenth and Fifteenth Amendments and seeking to enjoin its enforcement until preclearance had been obtained under § 5. The cases were consolidated and a three-judge District Court was convened.
  On March 6, 1972, the Attorney General interposed an objection to Act 932. Although the South Carolina District Court was aware of this objection — an objection that, standing alone, would have justified an injunction against enforcement of the Act — the court proceeded to address the constitutional validity of the reapportionment plan. That court rejected the Fifteenth Amendment claim for lack of evidence that Act 932 was racially motivated, but held that the Act violated the Fourteenth Amendment due to malapportionment. The court retained jurisdiction and allowed South Carolina 30 days to enact an acceptable substitute reapportionment plan. Twiggs v. West, Civ. No. 71-1106 (SC, Apr. 7, 1972).
  On May 6, 1972, a new senate reapportionment plan was enacted into law as § 2 of Act 1205. This new plan was filed with the District Court, and it was submitted to the Attorney General on May 12 for preclearance review. On May 23 the District Court found the plan constitutional. By letter dated June 30, the Attorney General notified South Carolina that he would not interpose an objection to the new plan because he felt “constrained to defer to the . . . determination of the three-judge District Court” in Twiggs v. West, supra. App. 48. Thus, as of June 30, 1972, § 2 of Act 1205 had been declared constitutional by a three-judge District Court, and the Attorney General had declined to interpose an objection under § 5 of the Voting Rights Act.
  Not content with the Attorney General’s decision to defer to the judicial determination of the three-judge District Court, several of the named plaintiffs in the consolidated Twiggs action commenced another suit in the United States District Court for the District of Columbia on August 10, 1972, in which they challenged the Attorney General’s failure to object to the new senate reapportionment plan. On May 16, 1973, that court ordered the Attorney General to make “a reasoned decision in accordance with his statutory responsibility.” Harper v. Kleindienst, 362 F. Supp. 742, 746 (1973). In response to this order, the Attorney General stated that in his view the plan violated the Fifteenth Amendment, but he reaffirmed his refusal to interpose an objection on the ground that he was constrained to defer to the ruling of the District Court in Twiggs v. West. App. to Brief for Appellants 4a. On July 19, 1973, the District of Columbia District Court directed the Attorney General to consider Act 1205 without regard to the decision in Twiggs v. West. The next day the Attorney General interposed an objection because he was “unable to conclude that Act No. 1205 does not have the effect of abridging voting rights on account of race.” App. 52.
  On appeal, the United States Court of Appeals for the District of Columbia Circuit affirmed. It held that the Attorney General’s decision not to interpose an objection was reviewable under the circumstances of this case, and that § 5 requires him to make an independent determination on the merits of § 5 issues. Harper v. Levi, 171 U. S. App. D. C. 321, 520 F. 2d 53 (1975).
  Armed with the decision of the Court of Appeals and the belated objection interposed by the Attorney General, two South Carolina voters filed the present suit in the United States District Court for the District of South Carolina as a class action under § 5 of the Voting Rights Act. See Allen v. State Bd. of Elections, 393 U. S. 544, 557-563 (1969). The plaintiffs, appellants here, sought an injunction against implementation of § 2 of Act 1205 on the ground that the Attorney General had interposed an objection and the State had not subsequently obtained a favorable declaratory judgment from the United States District Court for the District of Columbia. The three-judge District Court convened under § 5 dismissed the complaint. 425 F. Supp. 331 (1976). It held that the doctrine of collateral estoppel did not preclude it from considering South Carolina’s contention that, notwithstanding the decision in Harper v. Levi, supra, the requirements of § 5 were satisfied when the Attorney General failed to interpose an objection within 60 days after submission to him of Act 1205. The District Court also ruled that the Administrative Procedure Act did not authorize judicial review of the Attorney General’s initial determination to defer to the ruling of the three-judge District Court in Twiggs v. West. In light of these considerations, the District Court concluded that the failure of the Attorney General to interpose an objection within the applicable 60-day period left South Carolina free to implement the new senate reapportionment plan.
  We noted probable jurisdiction to determine the review-ability of the Attorney General’s failure to interpose a timely objection under § 5 of the Voting Rights Act. 429 U. S. 997 (1976). For the reasons stated below, we affirm.
  II
  The ultimate issue in this case concerns the implementation of South Carolina’s reapportionment plan for the State Senate. Since that plan has not been declared by the District Court for the District of Columbia to be without racially discriminatory purpose or effect, it can be implemented only if the Attorney General “has not interposed an objection” to the plan within the meaning of § 5 of the Voting Rights Act. It is conceded that no objection was entered within the 60-day period. 425 F. Supp., at 333. But appellants insist that the Attorney General’s nunc pro tunc objection of July 20, 1973, is effective under the Act and thus bars implementation of the reapportionment plan. Since that objection was interposed pursuant to the District Court’s order in Harper v. Kleindienst, its validity depends on whether the Harper court had jurisdiction under the Administrative Procedure Act to review the Attorney General’s failure to object.
  The Administrative Procedure Act stipulates that the provisions of that Act authorizing judicial review apply “except to the extent that — (1) statutes preclude judicial review; or (2) agency action is committed to agency discretion by law.” 5 U. S. C. § 701 (a). It is now well settled that “judicial review of a final agency action by an aggrieved person will not be cut off unless there is persuasive reason to believe that such was the purpose of Congress.” Abbott Laboratories v. Gardner, 387 U. S. 136, 140 (1967). The reviewing court must determine whether “Congress has in express or implied terms precluded judicial review or committed the challenged action entirely to administrative discretion.” Barlow v. Collins, 397 U. S. 159, 165 (1970).
  As no provision of the Voting Eights Act expressly precludes judicial review of the Attorney General’s actions under § 5, it is necessary to determine “whether nonreviewability can fairly be inferred.” 397 U. S., at 166. See Association of Data Processing Service Orgs. v. Camp, 397 U. S. 150, 157 (1970); Switchmen v. National Mediation Board, 320 U. S. 297 (1943). That inquiry must address the role played by the Attorney General within “the context of the entire legislative scheme.” Abbott Laboratories v. Gardner, supra, at 141.
  The nature of the § 5 remedy, which this Court has characterized as an “unusual” and “severe” procedure, Allen v. State Bd. of Elections, 393 U. S. 544, 556 (1969), strongly suggests that Congress did not intend the Attorney General’s actions under that provision to be subject to judicial review. Section 5 requires covered jurisdictions to delay implementation of validly enacted state legislation until federal authorities have had an opportunity to determine whether that legislation conforms to the Constitution and to the provisions of the Voting Rights Act. See South Carolina v. Katzenbach, 383 U. S. 301, 334 (1966). Section 5 establishes two alternative methods by which covered jurisdictions can comply with this severe requirement of federal preclearance review. First, a covered jurisdiction may file a declaratory judgment action in the District Court for the District of Columbia and subsequently may implement the change in voting laws if that court declares that the change “does not have the purpose and will not have the effect of denying or abridging the right to vote on account of race or color.” 42 U. S. C. § 1973c (1970 ed., Supp. V). Second, a covered jurisdiction may submit a change in voting laws to the Attorney General and subsequently may enforce the change if “the Attorney General has not interposed an objection within sixty days after such submission.” Ibid.
  According to the terms of § 5, a covered jurisdiction is in compliance pursuant to the latter alternative once it has (i) filed a complete submission with the Attorney General, and (ii) received no objection from that office within 60 days. This second method of compliance under § 5 is unlike the first in that implementation of changes in voting laws is not conditioned on an affirmative statement by the Attorney General that the change is without discriminatory purpose or effect. To the contrary, compliance with § 5 is measured solely by the absence, for whatever reason, of a timely objection on the part of the Attorney General. And this Court has recognized that “[o]nce the State has successfully complied with the § 5 approval requirements, private parties may enjoin the enforcement of the new enactment only in traditional suits attacking its constitutionality; there is no further remedy provided by § 5.” Allen v. State Bd. of Elections, supra, at 549-550.
  Although there is no legislative history bearing directly on the issue of reviewability of the Attorney General’s actions under § 5, the legislative materials do indicate a desire to provide a speedy alternative method of compliance to* covered States. Section 8 of the original bill provided for preclearance review only by means of a declaratory judgment action in the District Court for the District of Columbia. Hearings on S. 1564 before the Senate Committee on the Judiciary, 89th Cong., 1st Sess. (1965) (hereafter Senate Hearings). Justified concerns arose that the time required to pursue such litigation would unduly delay the implementation of validly enacted, nondiscriminatory state legislation. Cognizant of the problem, Attorney General Katzenbach suggested that the declaratory judgment procedure “could be improved by applying it only to those laws which the Attorney General takes exception to within a given period of time.” Senate Hearings 237. The legislation was changed to incorporate this suggestion.
  In light of the potential severity of the § 5 remedy, the statutory language, and the legislative history, we think it clear that Congress intended to provide covered jurisdictions with an expeditious alternative to declaratory judgment actions. The congressional intent is plain: The extraordinary remedy of postponing the implementation of validly enacted state legislation was to come to an end when the Attorney General failed to interpose a timely objection based on a complete submission. Although there was to be no bar to subsequent constitutional challenges to the implemented legislation, there also was to be “no dragging out” of the extraordinary federal remedy beyond the period specified in the statute. Switchmen v. National Mediation Board, 320 U. S., at 305. Since judicial review of the Attorney General's actions would unavoidably extend this period, it is necessarily precluded.
  Our conclusions in this respect are reinforced by the fact that the Attorney General’s failure to object is not conclusive with respect to the constitutionality of the submitted state legislation. The statute expressly provides that neither “an affirmative indication by the Attorney General that no objection will be made, nor the Attorney General’s failure to object . . . shall bar a subsequent action to enjoin enforcement” of the newly enacted legislation or voting regulation. Cf. Dunlop v. Bachowski, 421 U. S. 560, 569-570 (1975). It is true that it was the perceived inadequacy of private suits under the Fifteenth Amendment that prompted Congress to pass the Voting Rights Act. Allen v. State Bd. of Elections, 393 U. S., at 556 n. 21; South Carolina v. Katzenbach, 383 U. S., at 309. But it does not follow that Congress did not intend to preclude judicial review of Attorney General actions under § 5. The initial alternative requirement of submission to the Attorney General substantially reduces the likelihood that a discriminatory enactment will escape detection by federal authorities. Where the discriminatory character of an enactment is not detected upon review by the Attorney General, it can be challenged in traditional constitutional litigation. But it cannot be questioned in a suit seeking judicial review of the Attorney General's exercise of discretion under § 5, or his failure to object within the statutory period.
  Ill
  For these reasons, we hold that the objection interposed by the Attorney General to § 2 of Act 1205 on July 20, 1973, nunc pro tunc, is invalid. South Carolina is therefore free to implement its reapportionment plan for the State Senate.
  Affirmed.
  Act 932 provided for multimember districts, required each candidate to run for a single, numbered post, and specified that primary elections be decided by a majority vote. See Harper v. Levi, 171 U. S. App. D. C. 321, 325-326, 520 F. 2d 53, 57-58 (1975).
  Section 5, as set forth in 42 U. S. C. § 1973c (1970 ed., Supp. V), provides in pertinent part:
  “Whenever a State or political subdivision with respect to which the prohibitions set forth in section 1973b (a) of this title based upon determinations made under the first sentence of section 1973b (b) of this title are in effect shall enact or seek to administer any voting qualification or prerequisite to voting, or standard, practice, or procedure with respect to voting different from that in force or effect on November 1, 1964, . . . such State or subdivision may institute an action in the United States District Court for the District of Columbia for a declaratory judgment that such qualification, prerequisite, standard, practice, or procedure does not have the purpose and will not have the effect of denying or abridging the right to vote on account of race or color, or in contravention of the guarantees set forth in section 1973b (f) (2) of this title, and unless and until the court enters such judgment no person shall be denied the right to vote for failure to comply with such qualification, prerequisite, standard, practice, or procedure: Provided, That such qualification, prerequisite, standard, practice, or procedure may be enforced without such proceeding if the qualification, prerequisite, standard, practice, or procedure has been submitted by the chief legal officer or other appropriate official of such State or subdivision to the Attorney General and the Attorney General has not interposed an objection within sixty days after such submission, or upon good cause shown, to facilitate an expedited approval within sixty days after such submission, the Attorney General has affirmatively indicated that such objection will not be made. Neither an affirmative indication by the Attorney General that no objection will be made, nor the Attorney General’s failure to object, nor a declaratory judgment entered under this section shall bar a subsequent action to enjoin enforcement of such' qualification, prerequisite, standard, practice, or procedure. In the event the Attorney General affirmatively indicates that no objection will be made within the sixty-day period following receipt of a submission, the Attorney General may reserve the right to reexamine the submission if additional information comes to his attention during the remainder of the sixty-day period which would otherwise require objection in accordance with this section. Any action under this section shall be heard and determined by a court of three judges in accordance with the provisions of section 2284 of Title 28 and any appeal shall lie to the Supreme Court.”
  The constitutionality of this procedure was upheld in South Carolina v. Katzenbach, 383 U. S. 301 (1966). It has been held applicable when a State or political subdivision adopts a legislative reapportionment plan. Beer v. United States, 425 U. S. 130 (1976); Georgia v. United States, 411 U. S. 526 (1973); Allen v. State Bd. of Elections, 393 U. S. 544 (1969).
  See South Carolina v. Katzenbach, supra, at 319-320; Allen v. State Bd. of Elections, supra, at 548-550; Hadnott v. Amos, 394 U. S. 358, 366, and n. 5 (1969); Perkins v. Matthews, 400 U. S. 379, 380-382 (1971); Georgia v. United States, supra, at 529; City of Richmond v. United States, 422 U. S. 358, 361-362 (1975); Beer v. United States, supra, at 131-133; United Jewish Organizations v. Carey, 430 U. S. 144, 147-148 (1977) (plurality opinion).
  The objection was entered within the 60-day statutory period since the submission on Act 932 was not considered to be complete until January 5, 1972. See Georgia v. United States, supra, at 539-541; n. 19, infra. The Attorney General interposed an objection because he had been “unable to conclude . . . that the combination of multi-member districts, numbered posts, and a majority (run-off) requirement would not occasion an abridgement of minority voting rights in South Carolina.” App. 27.
  The District Court declined to rule on the claims under § 5 of the Voting Rights Act:
  “Prior to final arguments, the Attorney General of the United States had refused to approve the Act under the terms of the Voting Rights Act of 1965. The defendants stated, during argument, that they intended to contest that decision of the Attorney General in the District Court of the District of Columbia, which, by law, is the proper forum for review under the terms of the Voting Rights Act of 1965. We shall accordingly not consider the claims of the plaintiff McCollum, under the Voting Rights Act, but shall confine our consideration to the claims of invalidity under the Fourteenth and Fifteenth Amendments, which admittedly are properly before this Court.” App. to Jurisdictional Statement 30a.
  Section 2 reapportioned the State’s senatorial districts. It established two alternative reapportionments — Plan A and Plan B — and provided that if Plan A did not meet the constitutional guidelines as set forth by the District Court, Plan B would be put into effect. Act 1205 retained the provisions of Act 932 calling for multimember districts, numbered posts, and a majority vote in primaries. See Harper v. Levi, 171 U. S. App. D. C., at 326, 520 F. 2d, at 58.
  Section 3 of Act 1205 extended the numbered-post requirement to existing multimember districts in the State’s House of Representatives, the other chamber of the South Carolina General Assembly.
  This Court summarily affirmed the'decision of the District Court. Powell v. West, 413 U. S. 901 (1973).
  This Court held in Connor v. Waller, 421 U. S. 656 (1975), that reapportionment legislation adopted by the legislature on its own authority in the course of litigation is not effective in a covered jurisdiction until after compliance with § 5’s preclearance review provisions. (Such legislation is to be distinguished from a “reapportionment scheme . . . submitted and adopted pursuant to court order,” for which preclearance is not required. East Carroll Parish School Bd. v. Marshall, 424 U. S. 636, 638 n. 6 (1976).) In light of the decision in Waller, the Attorney General has now abandoned his earlier policy of deference to district court decisions on constitutionality. Brief for United States as Amicus Curiae 10, 16.
  While the Attorney General was considering Act 1205, South Carolina submitted for preclearance review Act 1204, which extended the numbered-post requirement to “all multi-member elective districts” in the State. See Harper v. Levi, supra, at 326, 520 F. 2d, at 58. On the same day that he declined to interpose an objection to § 2 of Act 1205, the Attorney General did interpose an objection to Act 1204 and to that portion of Act 1205 that required numbered posts for the State’s House of Representatives. See n. 6, supra. The District Court in Twiggs v. West had not considered any provisions relating to the House.
  The Court of Appeals stressed that the Harper plaintiffs contended only that “the Attorney General improperly relinquished his responsibility to independently evaluate the submitted legislation . . . .” Since they were “not challenging findings by the Attorney General on issues of fact, or an ultimate decision as to whether the submitting authority has discharged its burden of proving lack of discriminatory purpose or effect,” the court found it unnecessary to decide whether such findings and decisions would be reviewable. 171 U. S. App. D. C., at 335, 520 F. 2d, at 67. See also n. 24, infra.
  Appellants have not pressed the collateral-estoppel argument in this Court. See Brief for Appellants 17-20.
  Although appellants at one point argued in the District Court that Act 1205 was a court-ordered plan outside the scope of § 5, see East Carroll Parish School Bd. v. Marshall, supra; n. 8, supra, the parties now agree that § 5 is applicable. Brief for Appellants 3 n. 1; Brief for Appellees 14, and n. 7. See also Brief for United States as Amicus Curiae 14 n. 8.
  Appellants suggest that it is unnecessary for this Court to reach the issue of reviewability since the single-judge District Court in Harper v. Kleindienst, 362 F. Supp. 742 (DC 1973), issued an interlocutory order on August 11, 1972, declaring that the Attorney General’s time to object had not expired and extending the time until the Attorney General acted or until further order of the District Court. Relying on United States v. Mine Workers, 330 U. S. 258, 289-295 (1947), appellants contend that the Attorney General’s objection of July 20, 1973, is valid regardless of the District Court’s jurisdiction since it was entered pursuant to that court’s order preserving the status quo pending its determination of jurisdiction.
  The Mine Workers case involved the power of a district court to hold a party in contempt for disobedience of an order directed to that party. Appellants’ reliance on that case is misplaced, for South Carolina was not a party to the Harper litigation and was not under a court order restraining enforcement of § 2 of Act 1205. Here the validity of the District Court’s interlocutory order in Harper v. Kleindienst eventually turns on the re-viewability of the Attorney General’s initial decision not to enter an objection to §2 of Act 1205. If Congress has precluded judicial review of the Attorney General’s actions under § 5, the Harper court’s interlocutory order cannot validate the Attorney General’s nunc pro tunc objection of July 20, 1973.
  With several exceptions not relevant here, the Act defines an agency as “each authority of the Government of the United States, whether or not it is within or subject to review by another agency ...” 5 U. S. C. §701 (b)(1).
  Accord, Dunlop v. Bachowski, 421 U. S. 560, 567 (1975); Citizens to Preserve Overton Park v. Volpe, 401 U. S. 402, 410 (1971); Tooahnippah v. Hickel, 397 U. S. 598, 606 (1970); Association of Data Processing Service Orgs. v. Camp, 397 U. S. 150, 156-157 (1970); Barlow v. Collins, 397 U.S. 159, 166 (1970).
  Nor has this Court read § 5 to condition the interposition of an objection by the Attorney General on an affirmative finding that he has reason to believe that the change in voting laws has the prohibited purpose or effect. Compare Georgia v. United States, 411 U. S., at 540-541, with id., at 544-545 (White, J., dissenting), and id., at 545 (Powell, J., dissenting).
  Our prior cases have so described the statutory scheme. See, e. g., City of Richmond v. United States, 422 U. S., at 362 (change in voting laws cannot be implemented unless “such change has either been approved by the Attorney General or that officer has failed to act within 60 days after submission to him”); Georgia v. United States, supra, at 529 (change in voting laws can be implemented upon “submitting the plan to the Attorney General of the United States and receiving no objection within 60 days”).
  Compliance by means' of submission to the Attorney General was added to the bill, but neither the Committee Reports nor the debates discussed the addition. S. Rep. No. 162, 89th Cong., 1st Sess. (1965); H. R. Conf. Rep. No. 711, 89th Cong., 1st Sess. (1965). The legislative history is summarized in Harper v. Levi, 171 U. S. App. D. C., at 333, 520 F. 2d, at 65.
  The Attorney General has promulgated regulations providing that the 60-day period shall commence from the time that the Department of Justice receives a submission satisfying certain enumerated requirements. 28 CFR § 51.3 (b)-(d) (1976). These regulations were reviewed and found valid by this Court in Georgia v. United States, supra. The Court noted that “[t]he judgment that the Attorney General must make is a difficult and complex one, and no one would argue that it should be made without adequate information.” 411 U. S., at 540. To deny the Attorney General the power to suspend the 60-day period until a complete submission was tendered would leave him no choice but to interpose an objection to incomplete submissions, a result which “would only add acrimony to the administration of § 5.” Id., at 541.
  Nothing in our opinion in Georgia v. United States suggests that Congress did not intend to preclude judicial review of the Attorney General's failure to interpose an objection within 60 days of a complete submission. The factors relied on in that case are inapplicable once a complete submission has been pending before the Attorney General for 60 days. Indeed, subsequent judicial review of the Attorney General’s failure to interpose a timely objection to a complete submission would itself “add acrimony” by denying covered jurisdictions the statutorily prescribed “rapid method of rendering a new state election law enforceable.” Allen v. State Bd. of Elections, 393 U. S., at 549; see Georgia v. United States, supra, at 538.
  Mr. Justice Marshall’s dissent voices concern over a perceived “unique[ness]” of today’s decision. Post, at 514, and n. 10. But the decision is unique only in the sense that every judicial holding with respect to implied preclusion of judicial review is unique; “the context of the entire legislative scheme,” Abbott Laboratories v. Gardner, 387 U. S. 136, 141 (1967), differs from statute to statute. Dunlop v. Bachowski, 421 U. S. 560 (1975), the case cited by the dissent, illustrates the point. In that case, the Court did not confront anything analogous to the potential severity of the § 5 remedy at issue here. See supra, at 504. Moreover, the statute at issue in Dunlop provided that suit by the Secretary of Labor would be the exclusive post-election remedy. In the instant case, on the other hand, objection by the Attorney General is not the exclusive method of challenging changes in a State’s voting laws, since the Attorney General’s failure to object is not conclusive with respect to the constitutionality of submitted state legislation. See infra, this page.
  Similarly, an objection on the part of the Attorney General is not conclusive with respect to the invalidity of the submitted state legislation under the Constitution or the Voting Rights Act. After receiving an objection from the Attorney General, a covered jurisdiction retains the option of seeking a favorable declaratory judgment from the District Court for the District of Columbia. See Beer v. United States, supra; City of Petersburg v. United States, 410 U. S. 962 (1973), summarily aff’g 354 F. Supp. 1021 (DC 1972).
  Relying on the fact that § 4 of the Voting Rights Act expressly precludes judicial review of the Attorney General’s actions under that section, post, at 509-510, and n. 3, see Briscoe v. Bell, ante, p. 404, MR. Justice Marshall’s dissent would formulate a new mechanical rule of statutory construction: If one section of a statute expressly forbids judicial review, it would not be open for the courts to inquire whether Congress also intended to preclude review under other sections of the same statute. Application of such a rule of statutory construction would prevent a court from giving effe'ct to congressional intent that otherwise was clear from “the context of the entire legislative scheme.” Abbott Laboratories v. Gardner, supra, at 141. The existence of an express preclusion of judicial review in one section of a statute is a factor relevant to congressional intent, but it is not conclusive with respect to reviewability under other sections of the statute. Here, we simply conclude that other factors — the harsh nature of the § 5 remedy, the statutory language, and the legislative materials — are sufficiently strong indications of congressional intent to override any contrary inference that might be drawn from the fact that Congress expressly precluded judicial review in a different section of the same statute.
  Mr. Justice Marshall’s dissent opens with a “floodgates” argument: If there is no judicial review when the Attorney General misunderstands his legal duty, there also will be no judicial review when-at sometime in the future the Attorney General bargains acquiescence in a discriminatory change in a covered State’s voting laws in return for that State’s electoral votes. Post, at 508, and n. 1. That “floodgates” concern is equally applicable to Congress’ express preclusion of judicial review under § 4 of the Act, see n. 22, supra, a fact which suggests that Congress — like the courts— operates on the assumption that the Attorney General of the United States will perform faithfully his statutory responsibilities. In determining whether preclusion of judicial review can fairly be inferred from the context of the entire legislative scheme, we place no weight on the prospect that an Attorney General someday will trade electoral votes for preclearance under §5.
  The United States suggests that there should be limited judicial reveiw only when the Attorney General improperly relinquishes his responsibility to evaluate independently the submitted legislation in light of the standards established by § 5. Brief for United States as Amicus Curiae 30-31. For the reasons stated in text, we think Congress intended to preclude all judicial review of the Attorney General’s exercise of discretion or failure to act. We note, however, that there is no evidence in this case that the Attorney General improperly “relinquished” his statutory responsibilities. The record is clear that the Attorney General reviewed the submitted legislation as well as the judicial determination in Twiggs v. West and decided not to interpose an objection to § 2 of Act 1205. That decision may have been erroneous, see n. 8, supra, but it nonetheless was a decision exercised pursuant to the Attorney General's § 5 responsibilities.
  In light of this disposition of the case, we find it unnecessary to address the argument advanced by South Carolina that the single judge in Harper v. Kleindienst, 362 F. Supp. 742 (DC 1973), had no jurisdiction to determine questions arising under § 5 of the Voting Rights Act. See Allen v. State Bd. of Elections, 393 U. S., at 560-563.
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