The board may hold any hearings and conduct any investigations in any part of the state necessary to carry out the powers vested in it, and for such purposes has the powers conferred upon heads of departments of the state by Article 2 (commencing with Section 11180), Chapter 2, Part 1, Division 3, Title 2 of the Government Code.
Any hearing or investigation by the board may be conducted by any member upon authorization of the board, and he shall have the powers granted to the board by this section, but any final action of the board shall be taken by a majority of all the members of the board, at a meeting duly called and held.
All hearings held by the board or by any member thereof shall be open and public