California Food And Agricultural Code Section 38953

An imitation milk product, the composition and physical characteristics of which closely resemble those of a milk product or a specified variety of a milk product may be labeled imitation, followed by the name of the milk product imitated; for example, imitation milk, imitation coffee cream, imitation cheddar cheese. An imitation milk product, the composition and physical characteristics of which do not closely resemble those of a milk product or a defined variety of a milk product shall be labeled as imitation or filled or by any other term approved by the director, followed by a term which generally describes that category of milk product; for example, imitation milk product, imitation cream product, imitation cheese product.