California Code, Food and Agricultural Code (Formerly Agricultural Code) - FAC § 34263

Each sheet or page shall be authenticated by the signature of the licensed tester. A duplicate record shall be deposited by the licensed tester immediately after completing the test on the day's samples, in a box which is provided by the purchaser, receiver, or seller of milk, cream, or fluid derivative of milk or cream, as the case may be. The box shall be constructed, sealed, and maintained in accordance with the regulations of the director.