California Code, Government Code - GOV § 18653

The board shall meet in Sacramento as often as the needs of the public service may require and in such other places as it may designate. A majority of the members of the board constitutes a quorum. The vote of three concurring members shall be required to make any action of the board effective. The board shall keep minutes of its own proceedings and record its official actions.

The board may hold executive sessions as provided in Section 11126 of the Government Code to deliberate on (1) recommendations to the Governor or the Legislature, or (2) decisions to be reached following hearings related to the administration of the provisions of Part 1 (commencing with Section 18000) and Part 2 (commencing with Section 18500) of Division 5, of Title 2 of the Government Code or of the rules thereunder.