California Code
ARTICLE 2 - Administration
Section 8524.

8524. Four members of the board shall constitute a quorum for the transaction of business, for the performance of any duty, or the exercise of any power or authority of the board.

A vacancy on the board shall not impair the power of the remaining members to perform all duties and exercise all powers of the board providing the members remaining constitute a quorum.

(Amended by Stats. 1961, Ch. 1821.)