Cal. Fish & Game Code § 8688

In Districts 11, 12, and 13, gill nets may be used to take only herring, subject to Article 15 (commencing with Section 8550) of Chapter 2. No gill net may be possessed on any boat in Districts 11, 12, and 13, except by persons possessing a valid permit aboard boats specifically authorized to take herring during the open seasons established by the commission.