California Code, Elections Code - ELEC § 7612

Should a member appointed to membership pursuant to Section 7603 or 7604 cease to be a member for any of the reasons specified in Section 7611, the vacancy shall be filled by the person who appointed him or her, unless that person is himself or herself no longer a member of this committee or indicates that he or she does not wish to fill the vacancy, in which instances the committee shall do so.

Notice shall be given by the committee to a person entitled to fill a vacancy under this section as soon as possible after the occurrence of the vacancy.