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:
ARKANSAS v. SULLIVAN
No. 00-262.
Decided May 29, 2001
Per Curiam.
In November 1998, Officer Joe Taylor of the Conway, Arkansas, Police Department stopped respondent Sullivan for speeding and for having an improperly tinted windshield. Taylor approached Sullivan’s vehicle, explained the reason for the stop, and requested Sullivan’s license, registration, and insurance documentation. Upon seeing Sullivan’s license, Taylor realized that he was aware of “ ‘intelligence on [Sullivan] regarding narcotics.’ ” 840 Ark. 318-A, 318-B, 16 S.W. 3d 551, 552 (2000). When Sullivan opened his ear door in an (unsuccessful) attempt to locate his registration and insurance papers, Taylor noticed a rusted roofing hatchet on the ear’s floorboard. Taylor then arrested Sullivan for speeding, driving without his registration and insurance documentation, carrying a weapon (the roofing hatchet), and improper window tinting.
After another officer arrived and placed Sullivan in his squad car, Officer Taylor conducted an inventory search of Sullivan’s vehicle pursuant to the Conway Police Department’s Vehicle Inventory Policy. Under the vehicle’s armrest, Taylor discovered a bag containing a substance that appeared to him to be methamphetamine as well as numerous items of suspected drug paraphernalia. As a result of the detention and search, Sullivan was charged with various state-law drug offenses, unlawful possession of a weapon, and speeding.
Sullivan moved to suppress the evidence seized from his vehicle on the basis that his arrest was merely a “pretext and sham to search” him and, therefore, violated the Fourth and Fourteenth Amendments to the United States Constitution. Pet. for Cert. 3. The trial court granted the suppression motion and, on the State’s interlocutory appeal, the Arkansas Supreme Court affirmed. 340 Ark. 315, 11 S.W. 3d 526 (2000). The State petitioned for rehearing, contending that the court had erred by taking into account Officer Taylor’s subjective motivation, in disregard of this Court’s opinion in Whren v. United States, 517 U.S. 806 (1996). Over the dissent of three justices, the court rejected the State’s argument that Whren makes “the ulterior motives of police officers . . . irrelevant so long as there is probable cause for the traffic stop” and denied the State’s rehearing petition. 340 Ark., at 318-B, 16 S. W. 3d, at 552.
The Arkansas Supreme Court declined to follow Whren on the ground that “much of it is dicta.” 340 Ark., at 318-B, 16 S. W. 3d, at 552. The court reiterated the trial judge’s conclusion that “the arrest was pretextual and made for the purpose of searching Sullivan’s vehicle for evidence of a crime,” and observed that “we do not believe that Whren disallows” suppression on such a basis. Id., at 318-C, 16 S. W. 3d, at 552. Finally, the court asserted that, even if it were to conclude that Whren precludes inquiry into an arresting officer’s subjective motivation, “there is nothing that prevents this court from interpreting the U. S. Constitution more broadly than the United States Supreme Court, which has the effect of providing more rights.” 340 Ark., at 318-C, 16 S. W. 3d, at 552.
Because the Arkansas Supreme Court’s decision on rehearing is flatly contrary to this Court’s controlling precedent, we grant the State’s petition for a writ of certiorari and reverse. As an initial matter, we note that the Arkansas Supreme Court never questioned Officer Taylor’s authority to arrest Sullivan for a fine-only traffic violation (speeding), and rightly so. See Atwater v. Lago Vista, ante, p. 318. Rather, the court affirmed the trial judge’s suppression of the drug-related evidence on the theory that Officer Taylor’s arrest of Sullivan, although supported by probable cause, nonetheless violated the Fourth Amendment because Taylor had an improper subjective motivation for making the stop. The Arkansas Supreme Court’s holding to that effect cannot be squared with our decision in Whren, in which we noted our “vmwilling[ness] to entertain Fourth Amendment challenges based on the actual motivations of individual officers,” and held unanimously that “[sjubjective intentions play no role in ordinary, probable-cause Fourth Amendment analysis.” 517 U.S., at 813. That Whren involved a traffic stop, rather than a custodial arrest, is of no particular moment; indeed, Whren itself relied on United States v. Robinson, 414 U.S. 218 (1973), for the proposition that “a traffic-violation arrest . . . [will] not be rendered invalid by the fact that it was ‘a mere pretext for a narcotics search.’ ” 517 U. S., at 812-813.
The Arkansas Supreme Court’s alternative holding, that it may interpret the United States Constitution to provide greater protection than this Court’s own federal constitutional precedents provide, is foreclosed by Oregon v. Hass, 420 U.S. 714 (1975). There, we observed that the Oregon Supreme Court’s statement that it could “‘interpret the Fourth Amendment more restrietively than interpreted by the United States Supreme Court’” was “not the law and surely must be an inadvertent error.” Id., at 719, n. 4. We reiterated in Hass that while “a State is free as a matter of its own law to impose greater restrictions on police activity than those this Court holds to be necessary upon federal constitutional standards,” it “may not impose such greater restrictions as a matter of federal constitutional law when this Court specifically refrains from imposing them.” Id., at 719.
The judgment of the Arkansas Supreme Court is reversed, and the case is remanded for further proceedings not inconsistent with this opinion.
It is so ordered.
Sullivan’s motion for leave to proceed informa pauperis is granted. We have jurisdiction under 28 U. S. C. § 1257 notwithstanding the absence of final judgment in the underlying prosecution. See New York v. Quarles, 467 U.S. 649, 651, n. 1 (1984) (“[S]hould the State convict respondent at trial, its claim that certain evidence was wrongfully suppressed will be moot. Should respondent be acquitted at trial, the State will be precluded from pressing its federal claim again on appeal”).

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