The affairs of each proration zone shall be managed by a marketing program committee which is appointed in accordance with this chapter. The director shall appoint the initial marketing program committee from nominations which are received at the public hearing upon the proposed program. The term of office of the initial marketing program committee shall be for one marketing season. The term of office of subsequent marketing program committees for each marketing program shall be two years or until their successors have been appointed and have qualified. The beginning date of the term of office shall be set forth in the marketing program.