If any contract between a handler and a producer for the purchase of any market milk provides that the charges for the hauling of it shall be paid, in whole or in part, by the producer, and such hauling is done by the handler either directly or through an agent or by any person that contracts with, or is designated by, such handler for such hauling, the director may, and upon the written request of the producer or the written request of any association representing the producer shall, investigate the rates, terms, and conditions which are involved in such hauling in order to determine whether such rates, terms and conditions are in compliance with Section 62070.
If the director determines that such rates, terms, and conditions are not in compliance with Section 62070, he shall determine, within the standards which are prescribed in Section 62070, the maximum charges on account of such hauling that will comply with Section 62070 with respect to such purchase of market milk.