Every carrier of milk, cream, or any product of milk, whether a producer, gratuitous private carrier, private carrier for hire, or common carrier, shall maintain every conveyance which it uses in transporting milk and cream in a clean and sanitary condition.

Every conveyance, while transporting milk or cream or any clean empty container which is intended for milk or cream, and any shipping platform or premises where any such container is held while waiting shipment, shall either be enclosed or provided with a canvas covering or otherwise afforded protection from the direct rays of the sun, from warm air, dust, mud, rain, and other sources of contamination.

Milk, cream, or any product of milk or cream shall not be transported in connection with, or close to, any other commodity from which it may absorb any foreign flavor or which may contaminate it. Milk, cream, or any empty container which is used for milk or cream shall not be hauled in any vehicle which is used for hauling manure or garbage or in any other unclean conveyance.

Every milk or cream can or other shipping container for any product of milk shall be handled carefully and, while it contains milk, cream, or other product of milk, shall be kept right end up.

Nothing herein shall be construed to derogate from any powers or authority of the Public Utilities Commission of the state.

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.