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:
WHITE v. MARYLAND.
No. 600.
Argued April 16, 1963.
Decided April 29, 1963.
Fred E. Weisgal argued the cause and. filed a brief, for petitioner.
Robert F. Sweeney, Assistant Attorney General of Maryland, argued the' cause for respondent. With him on the brief was Thomas B. Finan, Attorney General of Maryland.
Per Curiam.
Petitioner, who was sentenced to death while his co-defendant was given life, appealed to the Maryland Court of Appeals which affirmed his conviction. 227 Md. 615, 177 A. 2d 877. We granted certiorari “limited to the point of law raised in Hamilton v. Alabama, 368 U. S. 52.” See 371 U. S. 909.
Petitioner was arrested on May 27, 1960, and brought before a magistrate on May 31, 1960, for a preliminary hearing. But that hearing was. postponed and not actually held until August 9,1960. At that time petitioner was not yet represented by a lawyer. When arraigned at that preliminary hearing he pleaded guilty. What Maryland calls the “arraignment” was first held September 8, 1960; but since petitioner was not represented by counsel, his arraignment was postponed and counsel appointed for him on September 9, 1960. He was finally arraigned on November 25,1960, and entered'pleas of “not guilty” and “not guilty by reason of insanity.” At his trial the plea of .guilty made at the preliminary hearing on' August 9, 1960, was introduced in evidence. Since he did not have counsel at the time of the preliminary hearing, he argued that Hamilton v. Alabama, supra, applied. The Court of Appeals disagreed, saying that arraignment in Alabama is “a critical stage in a criminal proceeding” where rights' are preserved or lost (368 U. S. 53-54), while.under Maryland law there was “no requirement (nor. any practical possibility under our present criminal procedure) to appoint counsel” for petitioner at the “preliminary hearing . . . nor was it necessary for appellant to enter a plea at that time.” 227 Md., at 625, 177 A. 2d, at 882.
Whatever may be the normal function of the “preliminary hearing” under Maryland law, it was in this case as “critical” a stage as arraignment under Alabama law. For petitioner entered a plea before the magistrate and that plea was taken at a time when he had no counsel.
Wé repeat what we said in Hamilton v. Alabama, supra, at 55, that we do not stop to determine whether prejudice resulted: “Only the presence of counsel could have enabled this accused to know all the defenses available to him and to-plead intelligently.” We therefore hold that Hamilton v. Alabama governs and that the judgment below must be and is.
Reversed.
Although petitioner did not object to the introduction of this evidence at the trial (227 Md., at 619-620, 177 A.2d, at 879), the rationale of Hamilton v. Alabama, supra/does not rest, as we shall see, on a showing of prejudice.

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: 1