In counties having a board of investments pursuant to Section 31520.2, no investment shall be made in real property unless it is approved by six votes of the board or, where a county board of supervisors or a county board of education has a material interest in the property unless it is approved by nine votes of the board.
Source:
Section 31601.1, https://leginfo.legislature.ca.gov/faces/codes_displaySection.xhtml?lawCode=GOV§ionNum=31601.1..