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:
McCONNELL v. RHAY, PENITENTIARY SUPERINTENDENT.
No. 87,
Misc.
Decided October 14, 1968.
Michael H. Rosen for petitioner in No. 458, Mise.
John J. O’Connell, Attorney General of Washington, and Stephen C. Way, Assistant Attorney General, for respondent in both cases.
Together with No. 458, Misc., Stiltner v. Rhay, Penitentiary Superintendent, also on petition for writ of certiorari to the same court.
Per Curiam.
The sole issue presented by these cases is whether our decision in Mempa v. Rhay, 389 U. S. 128 (1967), should be applied retroactively.
The facts in both cases are quite similar to those in Mempa. Petitioner Jack D. McConnell pleaded guilty to two counts of grand larceny by check. At a hearing on December 23, 1965, he was placed on probation for five years upon condition that he serve one year in the county jail. He was released from jail the following April, but five months later the prosecuting attorney moved that the December 23 order be revoked, alleging that McConnell had violated the terms of his probation. Two hearings on the motion followed — one on September 29, 1966, and the other on November 23, 1966. As a result of these hearings, McConnell was sentenced to two concurrent 15-year terms. At neither hearing was he represented by counsel or advised of his right to have counsel appointed.
Petitioner Douglas Stiltner pleaded guilty to burglary in the second degree and grand larceny, and on June 23, 1958, he was placed on probation and sentencing was deferred. As in McConnell’s case, the prosecuting attorney later moved for revocation of this order. Hearings on December 30, 1958, and January 8, 1959, led to the imposition of two concurrent 15-year sentences. Stiltner was neither represented nor advised of his right to have counsel appointed. Although Stiltner was subsequently convicted of another offense and is serving a sentence for that crime, the Washington Supreme Court found that it had the power to fashion appropriate relief, were Mempa v. Rhay applicable.
In habeas corpus proceedings, the Washington Supreme Court properly found that both petitioners’ Sixth Amendment rights were violated at their deferred sentencing hearings. That question was settled by our decision in Mempa. But the court denied relief in both cases, holding that Mempa should not be applied to cases in which probation and deferral or suspension of sentences had been revoked before November 13, 1967, the date upon which Mempa was decided. This was error.
This Court’s decisions on a criminal defendant’s right to counsel at trial, Gideon v. Wainwright, 372 U. S. 335 (1963); at certain arraignments, Hamilton v. Alabama, 368 U. S. 52 (1961); and on appeal, Douglas v. California, 372 U. S. 353 (1963), have been applied retroactively. The right to counsel at sentencing is no different. As in these other cases, the right being asserted relates to “the very integrity of the fact-finding process.” Linkletter v. Walker, 381 U. S. 618, 639 (1965); cf. Roberts v. Russell, 392 U. S. 293 (1968). As we said in Mempa, “the necessity for the aid of counsel in marshaling the facts, introducing evidence of mitigating circumstances and in general aiding and assisting the defendant to present his case as to sentence is apparent.” 389 U. S., at 135. The right to counsel at sentencing must, therefore, be treated like the right to counsel at other stages of adjudication.
Certiorari and the motions to proceed in forma pauperis are granted in both cases, the judgments are reversed, and the cases are remanded for further proceedings not inconsistent with this opinion.
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: 6
2