Mont. Code Ann. § 90-6-105
90-6-105 Meetings and acts of the board
90-6-105 . Meetings and acts of the board. (1) All meetings of the board are open to the public.
(2) All official acts of the board shall be in a regular or special meeting and by a majority of the board.
(3) All rules adopted by the board shall be in accordance with the Montana Administrative Procedure Act.