Cal. Food & Agric. Code § 33291

Every person that is engaged in the production of milk outside the jurisdiction of an approved milk inspection service and every person engaged in the processing, manufacture, or distribution of milk, milk products, or products resembling milk products, in the cleaning or sanitizing of bulk milk tanker trucks, or in the processing, manufacture, or freezing of ice cream, ice milk, sherbet, or any similar frozen product shall pay a cost-related inspection fee, not to exceed the reasonable costs of the services provided, to the secretary.