California Code, Business and Professions Code - BPC § 2013

(a) The board and a panel appointed under this chapter may convene from time to time as deemed necessary by the board.

(b) Four members of a panel of the board shall constitute a quorum for the transaction of business at any meeting of the panel.Eight members shall constitute a quorum for the transaction of business at any board meeting.

(c) It shall require the affirmative vote of a majority of those members present at a board or panel meeting, those members constituting at least a quorum, to pass any motion, resolution, or measure. A decision by a panel to discipline a physician and surgeon shall require an affirmative vote, at a meeting or by mail, of a majority of the members of that panel; except that a decision to revoke the certificate of a physician and surgeon shall require the affirmative vote of four members of that panel.