Each stabilization and marketing plan may contain provisions which authorize any handler that purchases market milk under contract from any producer to pool such market milk for producer payment purposes in accordance with such contracts, irrespective of whether such market milk is actually and physically received at the same milk products plant or diverted, in accordance with such plan. Such provisions may do any of the following:
(a)
Provide that market milk that is received from producers by milk products plants under the same ownership, may be pooled for purposes of payment to producers.
(b)
Provide that if a handler pools market milk, as provided in subdivision (a), the handler shall allocate, among all producers that participate in the class 1 usage, transportation savings which are applicable to market milk, not actually transported between the plant of first receipt and one or more other plants subject to the pool, and used for class 1, and may pay to producers shipping market milk directly to a plant subject to the pool a price for usage of such market milk for class 1, which price represents the average of minimum producer prices payable by that particular plant for such class 1 usage.