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:
INTERNATIONAL TYPOGRAPHICAL UNION, AFL-CIO, et al. v. NATIONAL LABOR RELATIONS BOARD.
No. 340.
Argued March 1, 1961.
Decided April 17, 1961.
Gerhard P. Van Arkel argued the cause for petitioners. With him on the briefs were Henry Kaiser and David 1. Shapiro.
Dominick L. Manoli argued the cause for respondent. With him on the briefs were former Solicitor General Rankin, Solicitor General Cox, Stuart Rothman and Norton J. Come.
Elisha Hanson, Arthur B. Hanson and Emmett E. Tucker, Jr. filed a brief for the Worcester Telegram Publishing Co., Inc., as amicus curiae, urging affirmance.
Mr. Justice Douglas
delivered the opinion of the Court.
This case involves a controversy that started in 1956 between petitioner Local 165 and the Worcester Telegram and between petitioner Local 38 and the Haverhill Gazette. The two unions insisted that the collective bargaining agreements that were being negotiated contain clauses or provisions to which each employer objected. The controversy as it reaches here is reduced to two clauses: first, that the hiring for the composing room be in the hands of the foreman; that he must be a member of the union; but that the union “shall not discipline the foreman for carrying out written instructions of the publisher or his representatives authorized by this Agreement” ; and second, that the General Laws of the International Typographical Union shall govern the relations between the parties if they are “not in conflict with state or federal law.” The unions’ demand that these clauses be included in the agreement led to a deadlock in the negotiations which in turn resulted in a strike.
The employers filed charges with the Board, complaints were issued, the cases consolidated, and hearings held. The Board concluded that the demands for the two clauses and the strikes supporting them were violations of the Act. It found that a demand for a contract that included those clauses was a refusal to bargain collectively within the meaning of § 8 (b) (3) of the National Labor Relations Act, as amended by the Taft-Hartley Act, 61 Stat. 136,140-141,29 U. S. C. §158 (b) (3). It found that striking to force acceptance of those clauses was an attempt to make the employers discriminate in favor of union members contrary to the command of § 8 (b) (2) of the Act. It also found that striking for the “foreman clause” was restraining and coercing the employers in the selection of their representatives for the adjustment of grievances in violation of §8 (b)(1)(B) of the Act. 123 N. L. R. B. 806. The Court of Appeals enforced the Board’s order apart from features not material here. 278 F. 2d 6. The case is here on certiorari, 364 U. S. 878.
What we have said in Labor Board v. News Syndicate Co., decided this day, ante, p. 695, is dispositive of the clause which incorporates the General Laws of the parent union “not in conflict with state or federal law.” On that phase of the case the judgment below must be reversed.

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: 4
3