California Code, Health and Safety Code - HSC § 6580.2

An officer elected or appointed pursuant to Section 6580.1 shall hold office until the election or appointment and qualification of his or her successor.

A district that has determined to consolidate its general district elections with the direct primary election may thereafter determine to conduct its general district elections pursuant to the Uniform District Election Law. In such event, the district board shall, at any time on or before July 15 of any odd-numbered year, adopt a resolution to that effect. A certified copy of the resolution shall be filed with the county elections official no later than July 20 of that year. Thereafter, the terms of each elective officer shall be determined pursuant to Section 10507 of the Elections Code, and, commencing with the first Tuesday after the first Monday in November of said year, all subsequent general district elections shall be held in the time and manner set forth in the Uniform District Election Law.