When is a limitation “jurisdictional,” and when is it not? Litigators encounter these questions all the time in statutory coverage issues, in time limitations, and in a host of other preconditions. They are critical, for jurisdictional limitations are not subject to waiver or equitable exceptions, may be raised at any time, and obligate courts to monitor and raise them sua sponte. In Bowles v. Russell, the Court held that the statutory time limitation for filing a notice of appeal is jurisdictional. This essay critiques Bowles, predicts some of the difficulties that it might cause, and offers a better approach.