California Code, Elections Code - ELEC § 1303

(a) Unless the principal act of a district provides that an election shall be held on one of the other dates specified in Chapter 1 (commencing with Section 1000) of Division 1, or except as provided in Section 1500, or except as provided in subdivision (b), a general district election to elect members of the governing board shall be held in each special district subject to Division 10 (commencing with Section 10000) on the first Tuesday following the first Monday in November of each odd-numbered year.

(b) Notwithstanding any other provision of law, a governing body of a special district may require, by resolution, that its elections of governing body members be held on the same day as the statewide general election. The resolution shall become operative upon the approval of the board of supervisors pursuant to Section 10404.