Cal. Code Regs. tit. 3, § 885
(g) The signature of the owner or his authorized representative and a declaration of ownership of the animal slaughtered and his willingness to defend title or adverse claim.
The person requested to slaughter the animal shall not be authorized to sign on behalf of the owner.
Hides and carcasses of bovine animals slaughtered on any premise other than the premises of a slaughterhouse licensed pursuant to Division 10, Chapter 10, Article 2, of the Food and Agricultural Code shall be identified with the special “Hide and Carcass Identification Tag,” approved by the Bureau of Livestock Identification.
The Hide and Carcass Identification Tag shall contain the following properties, and information:
Note: Authority cited for Section 885: Sections 407, 20171 and 22004, Food and Agricultural Code. Reference: Division 10, Food and Agricultural Code.