Cal. Code Regs. tit. 3, § 1180.4
(a) Each shipment of fresh or frozen meat, meat byproducts, horsemeat, horsemeat byproducts, poultry meat, or poultry meat byproducts for pet food imported into California must originate in an establishment under inspection of the Secretary or an approved state or local health agency and must be sealed at the point of origin under the supervision of the inspector in charge of the establishment. A permit for shipment must be secured from the Director, and each lot or shipment must be accompanied by a numbered certificate signed by the federal, state or local health agency inspector-in-charge showing: