specification requirement must be deemed jurisdictional, for the “mandatory nature of the time limits contained in Rule 4 would be vitiated if courts of appeals were permitted to exercise jurisdiction over parties not named in the notice of appeal.”
Ante, at 315. This unsupported assertion, however, is only correct if we assume the answer to the question at issue here,
i. e., that “[t]he failure to name a party in a notice of appeal . . . constitutes a failure of that party to appeal.”
Ante, at 314. If, on the other hand, we assume, as several Courts of Appeals have, that an unnamed party effectively appeals where a notice is timely filed and the unnamed party’s intention to join in the appeal is clear to all and prejudicial to none, see,
e. g., Harrison v.
United States, 715 F. 2d 1311, 1312-1313 (CA8 1983);
Williams v.
Frey, 551 F. 2d 932, 934, n. 1 (CA3 1977), then Rule 4’s mandatory time limitations would remain inviolate. The Court itself acknowledges that a “litigant’s action [may be] the functional equivalent of what the rule requires.”
Ante, at 317. It is obvious, however, that the initial determination whether a given act satisfies any test of “functional equivalence” depends not at all on the time limitations prescribed by Rule 4; it is only
after a court decides that a given act is not the functional equivalent of filing a notice of appeal that the necessity of amending any notice that was filed, and hence the necessity of enlarging the time requirements of Rule 4, arise.
The Court purports to find support for its jurisdictional construction of Rule 3(c) in the Advisory Committee Notes, which explain that Rules 3 and 4 “combine to require that a notice of appeal be filed with the clerk of the district court within the time prescribed for taking an appeal,” and that “[bjecause the timely filing of a notice of appeal is mandatory and jurisdictional. . . compliance with the provisions of those rules is of the utmost importance.” 28 U. S. C. App., p. 467. Arguing that this admonition does not differentiate