The program committee may receive from each producer for delivery into a stabilization or surplus pool the uncertificated portions of the commodity which is regulated by the marketing program and market it by any variety, grade, or size for the account of the producers if the uncertificated portion can be disposed of advantageously either in its original or a converted state. The marketing program committee shall designate the quantity or the percentage of the marketable supply of the commodity that shall be placed in the stabilization pool and the quantity or the percentage of the marketable supply of the commodity that shall be placed in the surplus pool. Any quantity or percentage which is so established is applicable to each producer.