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:
MORALES v. TURMAN et al.
No. 76-5881.
Decided March 21, 1977
Per Curiam.
The motion of American Orthopsychiatric Association et al. for leave to file a brief as amici curiae is granted.
This case from the United States Court of Appeals for the Fifth Circuit involves the proper scope of three-judge-court jurisdiction under 28 U. S. C. § 2281. Petitioners brought suit challenging allegedly unconstitutional punitive and inhumane conditions in Texas institutions housing juvenile delinquents, and the failure to provide juveniles with the rehabilitation or treatment that justified their confinement. A single District Judge determined that the juveniles’ constitutional rights had been violated, and ordered the parties to submit a curative plan. The Court of Appeals vacated the District Court’s decision on the ground that a three-judge court should have been convened in accordance with § 2281. 535 F. 2d 864 (1976).
The appellate court reasoned that the challenged, unwritten practices of the juvenile institutions administered by the Texas Youth Council were revealed during trial to be statewide in impact and that therefore they were equivalent to a statute with statewide applicability within the meaning of § 2281. Under the Court of Appeals’ analysis, the necessity of convening a three-judge court was thus not properly apparent until considerable factual development of the breadth and content of the Texas Youth Council’s administrative practices had taken place.
In construing § 2281, this Court has concluded that the three-judge court procedure is brought into play in any “suit which seeks to interpose the Constitution against enforcement of a state policy, whether such policy is defined in a state constitution or in an ordinary statute or through the delegated legislation of an ‘administrative board or commission.’ ” Phillips v. United States, 312 U. S. 246, 251 (1941). We have never, however, considered the generalized, unwritten practices of administration to be equivalent to the “delegated legislation” of an administrative board. In fact that approach was specifically rejected in Baxter v. Palmigiano, 425 U. S. 308 (1976), involving a challenge brought in a single-judge court to the Rhode Island prison system’s unwritten rule forbidding counsel at disciplinary hearings. In rejecting the argument that a three-judge court was necessary to resolve that challenge, we noted that the complaint did not meet the threshold requirements of § 2281 jurisdiction; it “did not mention or challenge any rule or regulation of the Authority; nor did it seek an injunction against the enforcement of any identified rule.” 425 U. S., at 313 n. 2. That description applies equally to the complaint in this case.
The ruling in Baxter merely reflected the consistent recognition that the three-judge court procedure is not “a measure of broad social policy to be construed with great liberality, but . . . an enactment technical in the strict sense of the term and to be applied as such.” Phillips v. United States, supra, at 251; see also Gonzalez v. Automatic Employees Credit Union, 419 U. S. 90, 98 (1974). The Court of Appeals' ruling improperly deviated from that understanding, and in addition it effectively transformed the jurisdictional inquiry from a threshold question to one depending upon the shifting proof during litigation, injecting intolerable uncertainty and potential delay into important litigation.
Accordingly we hold that the single District Judge properly exercised jurisdiction to decide this case, and that his judgment is reviewable on the merits in the Court of Appeals. See 28 U. S. C. § 1291. The petition for a writ of certiorari and the motion for leave to proceed in forma pauperis are granted, the judgment is reversed, and the case is remanded for further proceedings consistent with this opinion.
It is so ordered.
Public Law 94-381, Aug. 12, 1976, 90 Stat. 1119, prospectively repealed 28 U. S. C. § 2281. For cases pending at the time of repeal, § 2281 still governs jurisdiction, and provides:
“An interlocutory or permanent injunction restraining the enforcement, operation or execution of any State statute by restraining the action of any officer of such State in the enforcement or execution of such statute or of an order made by an administrative board or commission acting under State statutes, shall not be granted by any district court or judge thereof upon the ground of the unconstitutionality of such statute unless the application therefor is heard and determined by a district court of three judges under section 2284 of this title.”

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
3