California Code, Fish and Game Code - FGC § 8037

(a) A person who engages in business involving fish which business activity would require more than one class of license under this article shall obtain either a commercial fish business license issued under subdivision (a) of Section 8032 or each of the specialty licenses which are required for the classes of activities engaged in. Each plant, facility, or other place of business in which an activity occurs that is required to be licensed shall have a copy of the required license on the premises.

(b) This section shall become operative on January 1, 1993.