It shall be unlawful for the superintendent, manager, any officer, or any person or persons, board or body, acting or assuming to act for and on behalf of any institution, kept or maintained in whole or in part by this state, to expend for any fiscal year any greater sum for the maintenance or on account of such institution than shall have been appropriated by the Legislature therefor for such year except as provided in section thirteen, article one, chapter twenty-five of this code.