Cal. Elec. Code § 1405

(a) Except as provided below, the election for a county, municipal, or district initiative that qualifies pursuant to Section 9116, 9214, or 9310 shall be held not less than 88 nor more than 103 days after the date of the order of election. (1) When it is legally possible to hold a special election on an initiative measure that has qualified pursuant to Section 9116, 9214, or 9310 within 180 days prior to a regular or special election occurring wholly or partially within the same territory, the election on the initiative measure may be held on the same date as, and be consolidated with, that regular or special election. (2) When it is legally possible to hold a special election on an initiative measure that has qualified pursuant to Section 9116, 9214, or 9310 during the period between a regularly scheduled statewide direct primary election and a regularly scheduled statewide general election in the same year, the election on the initiative measure may be held on the same date as, and be consolidated with, the statewide general election. (3) To avoid holding more than one special election within any 180-day period, the date for holding the special election on an initiative measure that has qualified pursuant to Section 9116, 9214, or 9310, may be fixed later than 103 days but at as early a date as practicable after the expiration of 180 days from the last special election. (4) Not more than one special election for an initiative measure that qualifies pursuant to Section 9116, 9214, or 9310 may be held by a jurisdiction during any period of 180 days.

(b) The election for a county initiative that qualifies pursuant to Section 9118 shall be held at the next statewide election occurring not less than 88 days after the date of the order of election. The election for a municipal or district initiative that qualifies pursuant to Section 9215 or 9311 shall be held at the jurisdiction’s next regular election occurring not less than 88 days after the date of the order of election.