The term of office of each member and alternate member of the Fresh Pear Committee and the Processed Pear Committee shall be for two years beginning July 1 and ending June 30: Provided, That the terms of office of one-half the initial members and alternates shall end June 30, 2006; and that beginning with the 2005-2006 fiscal period, no member shall serve more than three consecutive two-year terms unless specifically exempted by the Secretary. Members and alternate members shall serve in such capacities for the portion of the term of office for which they are selected and have qualified and until their respective successors are selected and have qualified. The terms of office of successor members and alternates shall be so determined that one-half of the total committee membership ends each June 30.