Cal. Health & Safety Code § 32100.03

If the majority of votes cast in the election specified in Section 32100.01 are in favor of expansion of the board of directors, the board of directors of the district, which has been divided into zones pursuant to Section 32100.1, shall by resolution divide the district into seven zones. The resolution shall also specify the boundaries of each zone. At the expiration of the terms of office of the members of the board of directors then in office, and thereafter, such members of the board of directors shall be elected by the zones established by such resolution.