opinion: Per Curiam.
  Petitioner had instituted an administrative enforcement proceeding against the respondents, a group of individuals and business entities operating as the “Skycoach” air travel system. The Board’s complaint charged violation of its regulations as well as of the Civil Aeronautics Act and sought certain revocation and cease-and-desist orders against respondents. In the course of the proceedings, the Hearing Examiner issued a number of subpoenas duces tecum calling for the production of certain categories of documents of the respondent companies covering specified periods of time. On a motion to quash on the grounds, inter alia, that the subpoenas were vague, excessively broad in scope, and oppressive, both the Hearing Examiner and the Board found that the subpoenas described the documents to be produced with sufficient particularity, were reasonable in scope, and were not oppressive. Upon respondents’ continued refusal to honor the subpoenas, petitioner filed this enforcement proceeding. Initially the trial judge continued the cause for 10 days "on condition that respondents . . . make the documents specified in the administrative subpenas . . . available immediately to the representatives of the Civil Aeronautics Board for examination and copying at the usual places of business of the named respondents . . . Upon the expiration of this period, the court, on a showing that respondents had not complied with this condition, entered an order of enforcement allowing “a sufficient length of time between dates for the production of the documents ... so that the respondents will not be deprived of all of their books and records at the same time.” The court found that it could not say “that any of the documents or things called for in any of the subpoenas are immaterial or irrelevant to the proceedings before the Board . . without an examination of each of the items ordered produced. The Court of Appeals reversed, establishing certain procedural requirements the Board must follow before an enforcement proceeding is in order. 237 F. 2d 359.
  As we read the order of the District Court, it duly enforced the Board’s right to call for documents relevant to the issues of the Board’s complaint, with appropriate provisions for assuring the minimum interference with the conduct of the business of respondents. The judgment of the Court of Appeals is reversed and the cause is remanded to the District Court with instructions to reinstate its enforcement order of May 16, 1955. See § 1004 (b), Civil Aeronautics Act of 1938, 52 Stat. 1021, as amended, 49 U. S. C. § 644 (b); Brown v. United States, 276 U. S. 134, 142-143 (1928); Oklahoma Press Pub. Co. v. Walling, 327 U. S. 186 (1946); Endicott Johnson Corp. v. Perkins, 317 U. S. 501, 509 (1943). Of course this enforcement order leaves open to the respondents ample opportunities for objecting, on relevant grounds, to the admissibility into evidence of any particular document.
  It is so ordered.
instruction: What follows is an opinion from the Supreme Court of the United States. Your task is to determine whether the decision of the court whose decision the Supreme Court reviewed was itself liberal or conservative. In the context of issues pertaining to criminal procedure, civil rights, First Amendment, due process, privacy, and attorneys, consider liberal to be pro-person accused or convicted of crime, or denied a jury trial, pro-civil liberties or civil rights claimant, especially those exercising less protected civil rights (e.g., homosexuality), pro-child or juvenile, pro-indigent pro-Indian, pro-affirmative action, pro-neutrality in establishment clause cases, pro-female in abortion, pro-underdog, anti-slavery, incorporation of foreign territories anti-government in the context of due process, except for takings clause cases where a pro-government, anti-owner vote is considered liberal except in criminal forfeiture cases or those where the taking is pro-business violation of due process by exercising jurisdiction over nonresident, pro-attorney or governmental official in non-liability cases, pro-accountability and/or anti-corruption in campaign spending pro-privacy vis-a-vis the 1st Amendment where the privacy invaded is that of mental incompetents, pro-disclosure in Freedom of Information Act issues except for employment and student records. In the context of issues pertaining to unions and economic activity, consider liberal to be pro-union except in union antitrust where liberal = pro-competition, pro-government, anti-business anti-employer, pro-competition, pro-injured person, pro-indigent, pro-small business vis-a-vis large business pro-state/anti-business in state tax cases, pro-debtor, pro-bankrupt, pro-Indian, pro-environmental protection, pro-economic underdog pro-consumer, pro-accountability in governmental corruption, pro-original grantee, purchaser, or occupant in state and territorial land claims anti-union member or employee vis-a-vis union, anti-union in union antitrust, anti-union in union or closed shop, pro-trial in arbitration. In the context of issues pertaining to judicial power, consider liberal to be pro-exercise of judicial power, pro-judicial "activism", pro-judicial review of administrative action. In the context of issues pertaining to federalism, consider liberal to be pro-federal power, pro-executive power in executive/congressional disputes, anti-state. In the context of issues pertaining to federal taxation, consider liberal to be pro-United States and conservative pro-taxpayer. In miscellaneous, consider conservative the incorporation of foreign territories and executive authority vis-a-vis congress or the states or judcial authority vis-a-vis state or federal legislative authority, and consider liberal legislative veto. The lower court's decision direction is unspecifiable if the manner in which the Supreme Court took jurisdiction is original or certification; or if the direction of the Supreme Court's decision is unspecifiable and the main issue pertains to private law or interstate relations