Cal. Gov. Code § 57128

Where any special election or elections are called upon the question of confirmation of an order for a reorganization and the areas within which the election or elections are called contain overlapping territory of two or more cities or districts, within all of the overlapping territory the election precincts, polling places, voting booths, and ballot boxes shall, in every case, be the same and there shall be only one precinct board or set of election officers for each precinct.