The Chairman of the Board shall be elected by the Board and shall preside at all meetings of the Board. The Board shall select a Vice Chairman who acts in the Chairman's absence. The Board shall be authorized to appoint and fix the membership of such number of standing and temporary sub-committees as it may find expedient for the performance of its duties. The Building Official shall be an ex officio member of the Board and shall act as secretary to the Board and review any appeal to verify its validity but shall have no vote upon any matter before the Board.