What is the appeal period for an amended judgment?

^2. See CC-California Plaza Associates v. Paller & Goldstein (1996) 51 Cal.App.4th 1042, 1048, which states: "'When the trial court amends a nonfinal judgment in a manner amounting to a substantial modification of the judgment ... , the amended judgment supersedes the original and becomes the appealable judgment (there can be only one "final judgment" in an action ...). Therefore, a new appeal period starts to run from notice of entry or entry of the amended judgment.... On the other hand, if the amendment merely corrects a clerical error and does not involve the exercise of judicial discretion, the original judgment remains effective as the only appealable final judgment; the amendment does not operate as a new judgment from which an appeal may be taken.' [Citations.]"