The secretary shall appoint a committee, from nominations received from the commission, to administer Article 4 (commencing with Section 55040) and Article 5 (commencing with Section 55050), except as otherwise specified. The committee shall consist of four producers, four handlers, and one representative each of the California Crop Improvement Association, the California Warehouse Association, and the California Cooperative Rice Research Foundation. The secretary shall also appoint one member from the University of California who shall not be affiliated with the California Crop Improvement Association. If the secretary finds any of those nominated to be unacceptable, he or she shall notify the commission and request that another person be nominated. The commission shall appoint one ex officio member who shall be involved in the handling or breeding of seed, and may appoint any other ex officio members deemed reasonably necessary to implement this chapter.