Cal. Elec. Code § 10528

Except as otherwise provided by this part, the form of the ballot to be used by the voters of a landowner voting district participating in the general district election shall be governed by the principal act of that district. The county elections official shall determine and specify the form of the ballot to be used by the voters of resident voting districts and may, if practicable, provide a consolidated ballot covering two or more district elections in the same precinct.