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:
UNITED STATES v. MAINE et al. (MASSACHUSETTS BOUNDARY CASE)
No. 35, Orig.
Decided March 17, 1975
Decree entered October 6, 1975— Supplemental decree entered June 15, 1981 — Decided February 19,1985— Supplemental decree entered April 29,1985 — Decided February 25, 1986—
Supplemental decree entered February 26, 1996
The joint motion for entry of a supplemental decree is granted.
SUPPLEMENTAL DECREE
The Court having, by its decision of February 25, 1986, adopted the recommendation of its Special Master that Vineyard Sound constitutes historic inland waters and overruled the exception of Massachusetts to the Report of its Special Master herein insofar as it challenged the Master’s determination that the whole of Nantucket Sound does not constitute historic or ancient inland waters, and having, to this extent, adopted the Master’s recommendations and confirmed his Report:
IT IS ORDERED, ADJUDGED, AND DECREED as follows:
1. For the purposes of the Court’s Decree herein dated October 6, 1975, 423 U. S. 1 (affirming the title of the United States to the seabed more than three geographic miles seaward of the coastline, and of the States to the seabed within the three geographic mile zone), the coastline of the Commonwealth of Massachusetts shall be determined on the basis that the whole of Vineyard Sound constitutes state inland waters and Nantucket Sound (with the exception of interior indentations which are described in paragraphs 2(c), (d) and (e) below) is made up of territorial seas and high seas.
2. For purposes of said Decree of October 6, 1975, the coastline of Massachusetts includes the following straight lines:
(a) A line from a point on Gay Head on Martha’s Vineyard (approximately 41°21’10"N, 70°50'07"W) to the southwestern point of Cuttyhunk Island (approximately 41°24’39"N, 70°56'34"W);
(b) A line from a point on East Chop (approximately 41°28'15"N, 70°34’05"W) to a point on Cape Cod (approximately 41°33'10"N, 70°29'30"W);
(c) A line from a point southeast of East Chop (approximately 41°27'30"N, 70°33'18"W) to a point west of Cape Pogue (approximately 41°25'06"N, 70°27'56"W) on the island of Martha’s Vineyard;
(d) A line from a point on Point Gammon on Cape Cod (approximately 41°36'36"N, 70°15'40"W) to the southwestern-most point of Monomoy Island (approximately 41°33'02"N, 70°00'59"W); and
(e) A line from a point on the west coast of Great Island (approximately 41°37'08"N, 70°16'15"W) to a point on Hyannis Point on Cape Cod (approximately 41°37'27"N, 70°17'34"W).
3. The Court retains jurisdiction to entertain such further proceedings, enter such orders, and issue such writs as from time to time may be deemed necessary or advisable to effectuate and supplement the decree and the rights of the respective parties.
Justice Souter took no part in the consideration or decision of this motion and supplemental decree.

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