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:
THOMPSON v. IMMIGRATION AND NATURALIZATION SERVICE.
No. 496.
Decided January 6, 1964.
Hal Witt for petitioner.
Solicitor General Cox, Assistant Attorney General Miller, Beatrice Rosenberg and Julia P. Cooper for respondent.
Per Curiam.
Petitioner, a native and national of Canada, filed a petition for naturalization under the provisions of § 310 (b) of the Nationality Act of 1940, 8 U. S. C. (1946 ed.) § 710 (b), now 8 U. S. C. § 1430. On April 18, 1962, the United States District Court for the Northern District of Illinois entered a final order denying the petition on the ground that petitioner had failed to establish his attachment to the United States Constitution. Twelve days later, on April 30, 1962, petitioner served notice on the Immigration and Naturalization Service that he would appear before the trial judge on May 2, 1962, with post-trial motions “to amend certain findings of fact pursuant to Rule 52 F. R. C. P. and for a new trial pursuant to Rule 59 F. R. C. P.” The Government raised no objection as to the timeliness of these motions, and the trial court specifically declared that the “motion for a new trial” was made “in ample time.” On October 16, 1962, these motions were denied. On December 6, 1962, within 60 days of the denial of the post-trial motions but not within 60 days of the original entry of judgment by the District Court, petitioner filed a notice of appeal. The Government then moved in the Court of Appeals to dismiss the appeal on the ground that notice of appeal had not been filed within the 60-day period prescribed by Rule 73 (a) of the Federal Rules of Civil Procedure and that petitioner’s post-trial motions were untimely and hence did not toll the running of the time for appeal. The Court of Appeals granted the motions. Petitioner now seeks review by certiorari of the dismissal of his appeal.
Rule 73 (a) of the Federal Rules of Civil Procedure designates “the time within which an appeal may be taken” in this type of case as “60 days” from “the entry of the judgment appealed from . . . .” The Rule also declares that:
“the full time for appeal fixed in this subdivision commences to run and is to be computed from the entry of any of the following orders made upon a timely motion under such rules: . . . granting or denying a motion under Rule 52 (b) to amend or make additional findings of fact ... ; or granting or denying a motion under Rule 59 to alter or amend the judgment; or denying a motion for a new trial-under Rule 59.” (Emphasis added.)
It is clear that if petitioner’s post-trial motions were “timely,” then the appeal, which was filed within 60 days of the disposition of the motions, was timely. The Government alleges, however, that the post-trial motions were not timely since the applicable rules provide that they must be “served not later than 10 days after the entry of the judgment,” and these motions were served 12 days after the entry of judgment. The Government concludes, therefore, that since there was no “timely motion” under the rules designated in Rule 73 (a), the appeal must be, but was not, filed within 60 days of the entry of the original judgment.
Although petitioner admits that the post-trial motions were not served until 12 days after the entry of judgment, he claims that they should be deemed timely since they were served 10 days “from receipt of notice of entry of the judgment” by his lawyers who were not in court on the day the judgment was entered. He claims, moreover, that he relied on the Government’s failure to raise a claim of untimeliness when the motions were filed and on the District Court’s explicit statement that the motion for a new trial was made “in ample time”; for if any question had been raised about the timeliness of the motions at that juncture, petitioner could have, and presumably would have, filed the appeal within 60 days of the entry of the original judgment, rather than waiting, as he did, until after the trial court had disposed of the post-trial motions.
In a recent case involving a closely related issue, we recognized “the obvious great hardship to a party who relies upon the trial judge’s finding of ‘excusable neglect’ prior to the expiration of the [applicable period for filing an appeal] and then suffers reversal of the finding . . .” after the time for filing the appeal has expired. Harris Truck Lines, Inc., v. Cherry Meat Packers, Inc., 371 U. S. 215, 217. In that case petitioner had, within the applicable period for filing his appeal, received from the trial court a 30-day extension on the time for filing his appeal on the ground of “excusable neglect based on a failure of a party to learn of the entry of the judgment.” Fed. Rules Civ. Proc., 73 (a). Petitioner then filed his appeal within the period of the extension but beyond the original period. The Court of Appeals, concluding that there had been no “excusable neglect” within the meaning of Rule 73 (a), held that the District Court had erred in granting the extension and dismissed the appeal. We reversed the dismissal and remanded the case to the Court of Appeals “so that petitioner’s appeal may be heard on its merits.” Ibid. See also Lieberman v. Gulf Oil Corp., 315 F. 2d 403, cert. denied, 375 U. S. 823.
The instant cause fits squarely within the letter and spirit of Harris. Here, as there, petitioner did an act which, if properly done, postponed the deadline for the filing of his appeal. Here, as there, the District Court concluded that the act had been properly done. Here, as there, the petitioner relied on the statement of the District Court and filed the appeal within the assumedly new deadline but beyond the old deadline. And here, as there, the Court of Appeals concluded that the District Court had erred and dismissed the appeal. Accordingly, in view of these “unique circumstances,” Harris Truck Lines, Inc., v. Cherry Meat Packers, Inc., supra, at 217, we grant the writ of certiorari, vacate the judgment, and remand the case to the Court of Appeals so that petitioner’s appeal may be heard on the merits.
It is so ordered.

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