Cal. Food & Agric. Code § 9974

If the State Veterinarian has reason to suspect an irregularity in the application of a tuberculosis test or the identification of reactors, the State Veterinarian may enter any premises for the purpose of examining any bovine animals in or on the premises to determine if there has been any abuse or misuse of tuberculosis, or any faulty, unskillful, or irregular technique or procedure in the application of the tuberculosis test, identification of reactors, or identification of animals tested for tuberculosis.