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:
REES v. PEYTON, PENITENTIARY SUPERINTENDENT.
No. 321,
Misc.
Decided May 31, 1966.
S. White Rhyne, Jr., and Charles A. Dukes, Jr., for petitioner.
Reno S. Harp III, Assistant Attorney General of Virginia, for respondent.
Monroe H. Freedman and Melvin L. Wulf for the American Civil Liberties Union et al., as amici curiae, in support of the petition.
Per Curiam.
Following a related federal conviction and life sentences for kidnapping, United States v. Rees, 193 F. Supp. 849, Melvin Davis Rees, Jr., was convicted of murder and sentenced to death by a state court in Virginia, and the judgment was affirmed on appeal in 1962. Rees v. Commonwealth, 203 Va. 850, 127 S. E. 2d 406, cert. denied, 372 U. S. 964. Thereafter, a habeas corpus petition was filed in the United States District Court for the Eastern District of Virginia, alleging that the state court conviction had violated federal constitutional rights of Rees. The District Court rejected these claims, 225 F. Supp. 507, and the Court of Appeals for the Fourth Circuit affirmed, 341 F. 2d 859. With Rees’ consent, his counsel then filed in this Court on June 23, 1965, the present petition for certiorari to review the Court of Appeals’ decision, and the petition is therefore properly before us for disposition.
Nearly one month after this petition had been filed, Rees directed his counsel to withdraw the petition and forgo any further legal proceedings. Counsel advised this Court that he could not conscientiously accede to these instructions without a psychiatric evaluation of Rees because evidence cast doubt on Rees’ mental competency. After further letters from Rees to his counsel and to this Court maintaining his position, counsel had Rees examined by a psychiatrist who filed a detailed report concluding that Rees was mentally incompetent. Psychiatrists selected by the State who sought to examine Rees at the state prison found themselves thwarted by his lack of cooperation, but expressed doubts that he was insane.
Whether or not Rees shall be allowed in these circumstances to withdraw his certiorari petition is a question which it is ultimately the responsibility of this Court to determine, in the resolution of which Rees’ mental competence is of prime importance. We have therefore determined that, in aid of the proper exercise of this Court’s certiorari jurisdiction, the Federal District Court in which this proceeding commenced should upon due notice to the State and all other interested parties make a judicial determination as to Rees’ mental competence and render a report on the matter to us. While other courses have been suggested, cf. Anderson v. Kentucky, 376 U. S. 940, we think that all things considered the initial step should be the one just indicated. Until that step has been taken, we do not consider ourselves in a position to determine what disposition should be made of Rees’ petition for certiorari.
Accordingly, we shall retain jurisdiction over the cause in this Court and direct the District Court to determine Rees’ mental competence in the present posture of things, that is, whether he has capacity to appreciate his position and make a rational choice with respect to continuing or abandoning further litigation or on the other hand whether he is suffering from a mental disease, disorder, or defect which may substantially affect his capacity in the premises. To that end, it will be appropriate for the District Court to subject Rees to psychiatric and other appropriate medical examinations and, so far as necessary, to temporary federal hospitalization for this purpose. Cf. 18 U. S. C. §§4244-4245 (1964 ed.). If the State wishes to obtain additional evidence for the federal inquiry by examining Rees in its own facilities, we do not foreclose such a supplemental course of action. The District Court will hold such hearings as it deems suitable, allowing the State and all other interested parties to participate should they so desire, and will report its findings and conclusions to this Court with all convenient speed.
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