California Code, Food and Agricultural Code (Formerly Agricultural Code) - FAC § 61383

The sale or offer to sell or giving of any article in any transaction which involves the sale or disposal of milk, cream, or any dairy product, for less than the cost of the article, as “cost” is defined in Section 61384, to secure or retain the milk, cream, or dairy products business of any wholesale customer or any person that buys as a consumer is an unlawful practice.