Cal. Food & Agric. Code § 34806

A carrier of milk, cream, or any product of milk, whether a gratuitous private carrier, private carrier for hire, or common carrier, shall not receive or transport any milk, cream, or product of milk after notification by the director or an approved milk inspection service that such product is unclean, polluted, tainted, unwholesome, stale, impure, or adulterated, or has been produced in violation of any provision of this code, except as provided for in Section 32764.