The Connecticut Mental Health Center Advisory Board shall be composed of nine members. On or before July 1, 1973, and quadrennially thereafter, the Commissioner of Mental Health and Addiction Services, with the approval of the Board of Mental Health and Addiction Services, shall appoint five members of the advisory board for four-year terms and until their successors are appointed and have qualified to replace those whose terms expire. On or before July 1, 1975, and quadrennially thereafter, said commissioner, with the approval of the Board of Mental Health and Addiction Services, shall appoint four members of said advisory board for four-year terms and until their successors are appointed and have qualified to replace those whose terms expire. No member shall serve on said advisory board for more than two full consecutive terms. Two members of said board shall be nominated by Yale University, two members by the Yale-New Haven Hospital, Inc., and five members shall be appointed in the sole discretion of said commissioner. The advisory board shall cooperate with and advise and assist the director of the center in carrying out his duties. Upon his request, the advisory board shall advise the director in regard to policies and shall recommend on its own initiative policies and practices, which shall be considered at a duly called meeting of the advisory board.