Each of the governing bodies appointing a member of the board pursuant to Section 125050 shall also appoint one alternate to serve on the board when the member is not available. The alternate shall be subject to the same restrictions and shall have the same powers, when serving on the board, as the member.
Source:
Section 125051, https://leginfo.legislature.ca.gov/faces/codes_displaySection.xhtml?lawCode=PUC§ionNum=125051..