Cal. R. 8.902
A notice of appeal must be filed within 30 days after the rendition of the judgment or the making of the order being appealed. If the defendant is committed before final judgment for insanity or narcotics addiction, the notice of appeal must be filed within 30 days after the commitment.
If the defendant or the People timely appeals from a judgment or appealable order, the time for any other party to appeal from the same judgment or order is either the time specified in (a) or 30 days after the trial court clerk sends notification of the first appeal, whichever is later.
(Subd (b) amended effective January 1, 2016.)
A notice of appeal filed before the judgment is rendered or the order is made is premature, but the appellate division may treat the notice as filed immediately after the rendition of the judgment or the making of the order.
The trial court clerk must mark a late notice of appeal "Received [date] but not filed" and notify the party that the notice was not filed because it was late.
Cal. R. Ct. 8.902
Advisory Committee Comment
Subdivision (d). See rule 8.817(b)(5) for provisions concerning the timeliness of documents mailed by inmates or patients from custodial institutions.