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:
IOWA BEEF PACKERS, INC. v. THOMPSON et al.
No. 70-286.
Argued January 12, 1972
Decided February 29, 1972
Louis S. Goldberg argued the cause for petitioner. With him on the brief was P. L. Nymann.
Raymond Edward Franck argued the cause and filed a brief for respondents.
A. Raymond Randolph, Jr:, argued the cause pro hac vice for the United States as amicus curiae urging affirmance. With him on the brief were Solicitor General Griswold and Richard F. Schubert.
Per Curiam.
Respondents brought this suit in an Iowa District Court under § 16 (b) of the Fair Labor Standards Act, 52 Stat. 1069, as amended, 29 U. S. C. § 216 (b), to recover overtime compensation allegedly not paid by their petitioner employer in violation of the overtime provisions of the Act, 29 U. S. C. § 207 (a) (1). The District Court denied petitioner's motion to dismiss the action for failure of respondents to exhaust the grievance arbitration procedures provided in a collective-bargaining agreement between petitioner and respondents' union and awarded respondents the overtime claimed plus costs and attorneys’ fees. The Supreme Court of Iowa affirmed, 185 N. W. 2d 738 (1971). We granted certiorari, 404 U. S. 820 (1971).
The collective-bargaining agreement required petitioner to provide a lunch period for each employee no later than five hours from the start of an employee’s shift. Petitioner provided the lunch period but required the employees to remain on call during the period. Respondents did not choose, as perhaps under the contract was open to them, to make the requirement the basis of a grievance for alleged violation either of the lunch-period provision or of the hours-of-work provision, Art. VII, requiring time and one-half for hours worked over eight in any day or 40 in any week. They claimed instead that, because of the requirement, the Fair Labor Standards Act, as a matter of law, rendered the lunch period “work” time, whether or not actually worked, for' the purpose of determining whether petitioner violated its statutory obligation to pay overtime rates for work hours over 40 in any work week. See Armour & Co. v. Wantock, 323 U. S. 126 (1944). The grievance thus pertained not to an alleged violation of the agreement but to an alleged violation of the Fair Labor Standards Act.
In U. S. Bulk Carriers v. Arguelles, 400 U. S. 351 (1971), the Court held that a seaman could sue in federal court for wages under 46 U. S. C. § 596 without invoking grievance and arbitration procedures under a collective-bargaining agreement that provided for resolution of all disputes and grievances, not merely those based on alleged violations of the contract. We granted certiorari in this case to decide whether, similarly, employees may sue in court to recover overtime allegedly withheld in violation of the Fair Labor Standards Act, if their complaint of alleged statutory violation is also subject to resolution under grievance and arbitration provisions of a collective-bargaining agreement. It developed at oral argument, however, that the grievance and arbitration provisions, Art. XX of the collective-bargaining agreement involved in this case, do not have the broad scope of the procedures in Arguelles, but apply only to grievances “pertaining to a violation of the Agreement.” Moreover, the issues as presented by petitioner provide no occasion to address, and we intimate no view upon, the question whether, although the statutory claim is not subject to contract arbitration, pursuit of the statutory remedy is nevertheless barred because respondents might have made the requirement to be on call the basis of a grievance for alleged violation of the lunch period or overtime provision of the collective-bargaining agreement. In these circumstances, which were not fully apprehended at the time certiorari was granted, the writ of certiorari will be dismissed as improvidently granted. The Monrosa v. Carbon Black, Inc., 359 U. S. 180, 183 (1959).
It is so ordered.

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: 2