What follows is an opinion from the Supreme Court of the United States. Your task is to determine the bases on which the Supreme Court rested its decision with regard to the legal provision that the Court considered in the case. Consider "judicial review (national level)" if the majority determined the constitutionality of some action taken by some unit or official of the federal government, including an interstate compact. Consider "judicial review (state level)" if the majority determined the constitutionality of some action taken by some unit or official of a state or local government. Consider "statutory construction" for cases where the majority interpret a federal statute, treaty, or court rule; if the Court interprets a federal statute governing the powers or jurisdiction of a federal court; if the Court construes a state law as incompatible with a federal law; or if an administrative official interprets a federal statute. Do not consider "statutory construction" where an administrative agency or official acts "pursuant to" a statute, unless the Court interprets the statute to determine if administrative action is proper. Consider "interpretation of administrative regulation or rule, or executive order" if the majority treats federal administrative action in arriving at its decision.Consider "diversity jurisdiction" if the majority said in approximately so many words that under its diversity jurisdiction it is interpreting state law. Consider "federal common law" if the majority indicate that it used a judge-made "doctrine" or "rule; if the Court without more merely specifies the disposition the Court has made of the case and cites one or more of its own previously decided cases unless the citation is qualified by the word "see."; if the case concerns admiralty or maritime law, or some other aspect of the law of nations other than a treaty; if the case concerns the retroactive application of a constitutional provision or a previous decision of the Court; if the case concerns an exclusionary rule, the harmless error rule (though not the statute), the abstention doctrine, comity, res judicata, or collateral estoppel; or if the case concerns a "rule" or "doctrine" that is not specified as related to or connected with a constitutional or statutory provision. Consider "Supreme Court supervision of lower federal or state courts or original jurisdiction" otherwise (i.e., the residual code); for issues pertaining to non-statutorily based Judicial Power topics; for cases arising under the Court's original jurisdiction; in cases in which the Court denied or dismissed the petition for review or where the decision of a lower court is affirmed by a tie vote; or in workers' compensation litigation involving statutory interpretation and, in addition, a discussion of jury determination and/or the sufficiency of the evidence.

Opinion:
NATIONAL LABOR RELATIONS BOARD v. HIGHLAND PARK MANUFACTURING CO.
No. 425.
Argued April 23, 1951.
Decided May 14, 1951.
Mozart G. Ratner argued the cause for petitioner. With him on the brief were Solicitor General Perlman, James L. Morrisson, David P. Findling and Alvin Gallen.
Whiteford S. Blakeney argued the cause and filed a brief for respondent.
Briefs of amici curiae urging reversal were filed by J. Albert Woll, Herbert S. Thatcher and James A. Glenn for the American Federation of Labor; Arthur J. Goldberg and Thomas E. Harris for the Congress of Industrial Organizations; and Isadore Katz and David Jaffe for the Textile Workers Union of America.
Mr. Justice Jackson
delivered the opinion of the Court.
The National Labor Relations Board entertained a complaint by the Textile Workers Union of America against respondent, Highland Park Manufacturing Company, and ordered respondent to bargain with that Union. At all times relevant to the proceedings, the Textile Workers Union was affiliated with the Congress of Industrial Organizations and, while the Textile Workers Union officers had filed the non-Communist affidavits pursuant to statute, the officers of the C. I. O. at that time had not. The statute provides that “No investigation shall be made by the Board . . ., no petition under subsection (e) (1) of this section shall be entertained, and no complaint shall be issued pursuant to a charge made by a labor organization under subsection (b) of section 160 of this title, unless there is on file with the Board an affidavit executed ... by each officer of such labor organization and the officers of any national or international labor organization of which it is an affiliate or constituent unit that he is not a member of the Communist Party [etc.].” § 9 (h) of the National Labor Relations Act, as amended by the Labor Management Relations Act, 61 Stat. 146, 29 U. S. C. (Supp. Ill) § 159 (h). (Italics added.) The order was challenged upon the grounds, among others, that the failure of the C. I. O. officers to file non-Communist affidavits disabled its affiliate, the Textile Workers Union, and the Board could not entertain their complaint and enter the order.
The general counsel of the Board had ruled that the Board could not entertain a complaint under these circumstances; but the Board, with one member dissenting, overruled him, for reasons stated in Matter of Northern Virginia Broadcasters, 75 N. L. R. B. 11. The Court of Appeals for the District of Columbia Circuit reached the same conclusion as the Board in West Texas Utilities Co. v. Labor Board, 87 U. S. App. D. C. 179, 184 F. 2d 233. The Court of Appeals for the Fourth Circuit in this case, 184 F. 2d 98, and the Court of Appeals for the Fifth Circuit, in Labor Board v. Postex Cotton Mills, 181 F. 2d 919, arrived at a contrary result, holding that the Board could not entertain the complaint. The conflicting results are each so well-considered and so thoroughly documented in opinions already appearing in the books that little could be added to either. We agree with the conclusions of the Fourth and Fifth Circuits.
The definition of “labor union” in the statute con-cededly includes the C. I. O. It is further conceded that the phrase “labor organization national or international in scope” as found in § 10 (c) refers to the A. F. of L. and C. I. O. (Italics added.) But it is claimed that when the adjectives “national” or “international” are alone added, they exclude the C. I. 0., because it is regarded in labor circles as a federation rather than a national or international union. We think, however, that the use of geographic terms to reach nation-wide or more than nation-wide unions does not exclude those of some particular technical structure. The C. I. 0., being admittedly a labor union and one of nation-wide jurisdiction, operation and influence, is certainly in the speech of people a national union, whatever its internal composition. If Congress intended geographic adjectives to have a structural connotation or to have other than their ordinarily accepted meaning, it would and should have given them a special meaning by definition.
The language in its ordinarily accepted sense is consistent with the context and purpose of the Act, which we have defined at length in American Communications Assn. v. Douds, 339 U. S. 382. As the Courts of Appeals for both the Fourth and Fifth Circuits have said, the congressional purpose was to “wholly eradicate and bar from leadership in the American labor movement, at each and every level, adherents to the Communist party and believers in the unconstitutional overthrow of our Government.” 181 F. 2d 919, 920; 184 F. 2d 98, 101. It would require much clearer language of exemption to justify holding that the very top levels of influence and actual power in the labor movement in this country were untouched while only the lower levels were affected.
The further contention is advanced by the Board that the administrative determination that a petitioning labor organization has complied with the Act is not subject to judicial review at the instance of an employer in an unfair labor practice proceeding. If there were dispute as to whether the C. I. O. had filed the required affidavits or whether documents filed met the statutory requirements and the Board had resolved that question in favor of the labor organizations, a different question would be presented. But here there is no question of fact. While the C. I. O. officers have since filed the affidavits, they were not on file at any time relevant to this proceeding.
It would be strange indeed if the courts were compelled to enforce without inquiry an order which could only result from proceedings that, under the admitted facts, the Board was forbidden to conduct. The Board is a statutory agency, and, when it is forbidden to investigate or entertain complaints in certain circumstances, its final order could hardly be valid. We think the contention is without merit and that an issue of law of this kind, which goes to the heart of the validity of the proceedings on which the order is based, is open to inquiry by the courts when they are asked to lend their enforcement powers to an administrative tribunal.
Judgment affirmed.
Mr. Justice Black took no part in the consideration or decision of this case.

Question: What is the basis of the Supreme Court's decision?

Choices:
judicial review (national level)
judicial review (state level)
Supreme Court supervision of lower federal or state courts or original jurisdiction
statutory construction
interpretation of administrative regulation or rule, or executive order
diversity jurisdiction
federal common law

Answer: 3