California Code
CHAPTER 3 - General Requirements
Section 32916.

32916. All cream, skim milk, buttermilk, ice cream, butter, cheese, or other milk product which is sold, designated, or advertised as certified shall be conspicuously marked with the name of the commission which certifies it and certifies the milk from which such cream, skim milk, buttermilk, ice cream, butter, cheese and other milk product was obtained.

(Enacted by Stats. 1967, Ch. 15.)