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:
FLOWER v. UNITED STATES
No. 71-1180.
Decided June 12, 1972
Per Curiam.
Petitioner John Thomas Flower, a regional “Peace Education Secretary” of the American Friends Service Committee and a civilian, was arrested by military police while quietly distributing leaflets on New Braunfels Avenue at a point within the limits of Fort Sam Houston, San Antonio, Texas. In an ensuing prosecution before the United States District Court for the Western. District of Texas on charges of violating 18 U. S. C. § 1382 (“Whoever reenters or is found [within a military post] after having been removed therefrom or ordered not to reenter by any officer or person in command or charge thereof — Shall be fined not more than $500 or imprisoned not. more than six months, or both”), it was established that petitioner had previously been barred from the post by ordfer of the deputy commanda’ because of alleged participation in an attempt to distribute “unauthorized” leaflets. The District Court found that § 1382 “is a valid law” and was validly applied. It sentenced petitioner to six months in prison. A divided panel of the Court of Appeals for the Fifth Circuit affirmed.. 452 F. 2d 80 (CA5 1972).
We reverse. Whatever power the authorities may have to restrict general access to a military facility, see Cafeteria & Restaurant Workers v. McElroy, 367 U. S. 886 (1961), here the fort commander chose not to exclude the public from the street where petitioner was arrested. As Judge Simpson, dissenting/noted below:
“There is -no sentry post or guard at either entrance or anywhere along the route. Traffic flows through the post on this and other streets 24 hours a day. A traffic count conducted on New Braunfels Avenue on January 22, 1968, by the Director of Transportation of the city of San Antonio, shows a daily (24-hour) vehicular count of 15,110 south of Grayson Street (the place where the street enters the post boundary) and 17,740 vehicles daily north of that point. The street is an important traffic artery used freely by buses, taxi cabs and other public transportation facilities as well as by private vehicles, and its sidewalks are used extensively at all hours . of the day by civilians as well as by military personnel. Fort Sam Houston was an open post; the street, New Braunfels Avenue, was a completely open street.” 452 F. 2d, at 90.
Under such circumstances the military has abandoned ' any claim that it has special interests in who walks, talks, or distributes leaflets on the avenue. The base commandant can no more order petitioner off this public street because he was distributing leaflets than could the city police order any leafleteer off any public street. Cf. Lovell v. City of Griffin, 303 U. S. 444 (1938), Schneider v. State, 308 U. S. 147 (1939). “[S]treets are natural and proper places for the dissemination of information and opinion,” 308 U. S., at 163. “[0]ne who is rightfully on a street which the state has left open to the public carries with him there as elsewhere the constitutional right to express his views in an orderly fashion.” Jamison v. Texas, 318 U. S. 413, 416 (1943).
The First Amendment protects petitioner from the application of § 1382 under conditions like those of this case. Accordingly, without need to set the matter for further argument, we grant the petition for a writ of certiorari 'and reverse the conviction.
Reversed and remanded.
Mr. Justice Blackmun dissents, for he would grant the petition for 'certiorari and hear argument on the merits.

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: 0