Constitution of the State of California 1879 Art. IX, § 3.3

Sec. 3.3.  Except as provided in Section 3.2 of this article, it shall be competent to provide in any charter framed for a county under any provision of this Constitution, or by the amendment of any such charter, for the election of the members of the county board of education of such county and for their qualifications and terms of office.