(a) The Secretary shall limit the handling of potatoes whenever he finds from the recommendations and information submitted by the committee, or from other available information, that such regulation will tend to effectuate the declared policy of the act. Such limitation may:

(1) Regulate in any or all portions of the production area, the handling of particular grades, sizes, qualities, or maturities, or any combination thereof, of any or all varieties of potatoes during any period; or

(2) Regulate the shipment of particular grades, sizes, qualities, or maturities of potatoes differently, for different varieties, for different portions of the production area, for different packs, for different containers, or for any combination of the foregoing, during any period; or

(3) Fix the size, capacity, weight, dimensions, pack, labeling or marking of the container, or containers, which may be used in the packaging or handling of potatoes, or both; or

(4) Regulate the shipment of potatoes by establishing, in terms of grades, sizes, or both, minimum standards of quality and maturity.

(b) [Reserved]