(a) The board shall elect a director as chairman. The chairman shall preside at board meetings and perform other duties and functions prescribed by the board. The chairman may vote in the same manner as any other director.
(b) The board shall elect a secretary, who is not required to be a director. The secretary is the official custodian of the minutes, books, records, and seal of the board and shall perform other duties and functions prescribed by the board.
(c) The board may elect any other officer that the board considers necessary or advisable.