Whenever the Committee deems it advisable to establish a container regulation for any variety of dates, it shall recommend to the Secretary the size, capacity, weight, or pack of the container, or containers, which may be used in the handling or packaging of dates, or both. If the Secretary finds upon the basis of such recommendation or other information available to him that such container regulation would tend to effectuate the declared policy of the act he shall establish such regulation and notice thereof showing the effective date shall be sent by the Committee to all handlers of record. After the effective date of such regulation, no handler shall handle dates of such variety except in accordance with such regulation and all other applicable requirements in effect pursuant to this part.