California Code, Food and Agricultural Code (Formerly Agricultural Code) - FAC § 19016

(a)(1) Except as provided in paragraph (2), all custom slaughtered livestock carcasses and parts shall be marked in a manner required by the department to identify the inspected premises and that the products are not for sale.

(2) Fallow deer carcasses and parts thereof intended for transportation or sale shall be marked in a manner required by the department to identify the inspected premises and to show that the products have been inspected under this chapter.