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:
BLACK v. UNITED STATES.
No. 1029,
October Term, 1965.
Certiorari denied May 2, 1966
Rehearing and certiorari granted and case decided November 7, 1966.
Hans A. Nathan, Warren E. Magee and Bert B. Rand for petitioner.
Solicitor General Marshall for the United States.
Per Curiam.
In Davis v. United States, post, p. 927, we today denied the- petition for certiorari. The sole question raised there (but not passed upon by the Court of Appeals because not necessary to its disposition) involved petitioners’ claim that conferences between petitioners and their counsel were surreptitiously overheard and intercepted by law enforcement officials through concealed monitorial devices built into the jail where petitioners were being held for federal authorities. The Solicitor General did not deny the existence of the devices but said that there were no recordings of the conversations in question. He pointed out that since the case has been remanded by the Court of Appeals for a new trial on other grounds, a full exploration of this question could be made on retrial. In the light of these representations we denied the petition for certiorari so that the question might be fully explored at the new trial, as suggested by the Solicitor General.
In the instant case, Black v. United States, the petition for rehearing now raises a similar question and while Davis v. United States, supra, is not controlling, its relation is obvious. In Black the Solicitor General advised the Court voluntarily on May 24, 1966, after the petition for certiorari had been denied, 384 U. S. 927, but before an application for rehearing had been filed, that agents of the Federal Bureau of Investigation, in a matter unrelated to this case, on February 7, 1963, installed a listening device in petitioner’s hotel suite in Washington, D. C. The device monitored and taped conversations held in the hotel suite during the period the offense was being investigated and beginning some two months before and continuing until about one month after the evidence in this case was presented to the Grand Jury. During that period, “the monitoring agents,” the Solicitor General advised, “overheard, among other conversations, exchanges between petitioner and the attorney who was then representing him [Black]” in this case. In a supplemental memorandum filed July 13, 1966, the Solicitor General, in response to an inquiry by the Court, stated that the recordings of such interceptions had been erased from the tapes but that notes summarizing and sometimes quoting the conversations intercepted were available, and that reports and memoranda concerning the same had been made. “Neither the reports nor the memoranda,” he reported, “were seen by attorneys of the Tax Division responsible for the prosecution of” this case until January 1964, when in preparing for trial they were included in material transmitted to them; the reports and memo-randa of the intercepted conversations were examined by the Tax Division attorneys and retained by them until April 15, 1964, when petitioner’s trial began; and the attorneys never realized until April 21, 1966, that any conversations between Black and his attorney had been overheard and included in the transcriptions.
The Solicitor General advised further that the “Tax Division attorneys found nothing in the F. B. I. reports or memoranda which they considered relevant to the tax evasion case.” He suggests that the judgment be vacated and remanded to the District Court in which the “relevant materials would be produced and the court would determine, upon an adversary hearing, whether petitioner’s conviction should stand.” We have sometimes used this technique in federal criminal cases, United States v. Shotwell Mfg. Co., 355 U. S. 233. However, its use has never been automatic. Indeed, in Remmer v. United States, 347 U. S. 227, we found it necessary, despite the hearing in the District Court, to subsequently order a new trial on the merits, 350 U. S. 377. There are other complicating factors here that were not present in Remmer. There the judge had been informed of the alleged jury tampering, but here neither the judge, the petitioner nor his counsel knew of the action of the federal agents. Moreover, the Solicitor General advises that the Tax Division attorneys did not know at the time of the trial that conversations between Black and his attorney were included in the transcriptions. In view of these facts it appears that justice'requires that a new trial be held so as to afford the petitioner an opportunity to protect himself from the use of evidence that might be otherwise inadmissible.
This Court has never been disposed to vacate convictions without adequate justification, but, under the circumstances presented by the Solicitor Ceneral in this case we believe that a new trial must be held. This will give the parties an opportunity to present the relevant evidence and permit the trial judge to decide the questions involved. It will also permit the removal of any doubt as to Black’s receiving a fair trial with full consideration being, given to the new evidence reported to us by the Solicitor General.
The petition for rehearing is therefore granted, the order denying certiorari vacated, certiorari granted, the judgment of the Court of Appeals vacated and the cause remanded to the District Court for a new trial.
Mr. Justice White and Mr. Justice Fortas 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: 2