Cal. Ed. Code § 5342
Whenever any school district election or community college district election is scheduled to be held on the same day, in the same territory, or in territory that is in part the same, as an election or elections called to be held by any other district, city, county, or other political subdivision, the district election may be either completely or partially consolidated with the election or elections pursuant to Part 3 (commencing with Section 10400) of Division 10 of the Elections Code.
The consolidation may be effected by the officer conducting the election upon receipt of resolutions from two or more political subdivisions whose boundaries are totally or partially the same territory calling elections to be held on the same day if the resolutions are delivered to the officer conducting the election at least 88 days prior to the date of the election.
Ca. Educ. Code § 5342