California Code, Food and Agricultural Code (Formerly Agricultural Code) - FAC § 39901

(a) Dairy beverages are milk and dairy food beverages resembling milk or milk products. However, dairy beverages do not conform to the compositional standards for milk or milk products as established in this code or Title 21 of the Code of Federal Regulations because they contain safe and suitable ingredients or combinations of ingredients not specified in those standards. Dairy beverages are products intended for consumption as a beverage. Milk or the components of milk shall comprise at least 15 percent of the product on a dry matter basis or at least 2 percent on a total weight basis.

(b) For purposes of establishing compliance with the minimum dairy ingredient criteria, dairy ingredients shall include all products, components, and derivatives of milk, including, but not limited to, whey and whey products and caseinates specified in subdivision (c) of Section 135.110 of Title 21 of the Code of Federal Regulations, but excluding added lactose.