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:
SMITH v. PENNSYLVANIA.
No. 561.
Decided March 9, 1964.
William T. Coleman, Jr. for petitioner.
Frank P. Lawley, Deputy Attorney General of Pennsylvania, for respondent.
Solicitor General Cox filed a memorandum for the United States.
Melvin L. Wulf for the American Civil Liberties Union, Greater Philadelphia Branch, et ah, as amici curiae, in support of the petition.
Per Curiam.
Prior to commencement of petitioner’s trial for assault and battery upon state police officers, he served upon the local office of the Federal Bureau of Investigation a subpoena duces tecum calling for the production of “[statements of all witnesses, diagrams, sketches and photographs taken in connection with” the FBI’s investigation of the incident which formed the basis for the criminal prosecution. The FBI had made the investigation in response to a complaint filed by petitioner with the Civil Rights Division of the Department of Justice, charging a deprivation of his civil rights by the actions of the police officers whom he allegedly assaulted. An Assistant United States Attorney appeared on the day set for trial and moved to quash the subpoena, claiming that the file contained confidential material subject to a federal privilege of nondisclosure. The subpoena was quashed by the trial court for that reason and for noncompliance with local rules of practice.
Petitioner formally requested the court, both before and after they testified, to issue a subpoena duces tecum for statements taken by the FBI from two witnesses for the prosecution, stating that the statements were needed for purposes of impeachment. The trial court denied the requests because it felt that petitioner would receive the same information from material which the state authorities had promised to make available. Following petitioner’s conviction, the trial court denied his motion for a new trial which was based in part on the failure to issue the requested subpoena, stating that the Federal Government had already indicated that it would not honor such a subpoena. The judgment of conviction was affirmed by the Pennsylvania Supreme Court (412 Pa. 1, 192 A. 2d 671), the court stating, inter alia, that the FBI, not the Commonwealth, had denied petitioner access to the information in question.
In response to an inquiry from this Court, the Solicitor General has indicated that the claim of confidential privilege was concerned solely with the initial broad-based demand for virtually the entire FBI file on the matter and that the Department of Justice was not informed of, and did not refuse to comply with, the subsequent specific requests for statements given by the two witnesses.
We grant the petition for a writ of certiorari and remand the case to the Supreme Court of Pennsylvania, for reconsideration of petitioner’s requests in light of the representations of the Solicitor General.

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