Cal. Pub. Util. Code § 29721

If an election is required to be held, pursuant to the provisions of Section 29712, the board shall call such election within 60 days after the petition or resolution is filed with the secretary of the district; provided that if a general election is to be held within the petitioning public agency within 120 days after the petition or resolution is filed with the secretary of the district, the board may consolidate the election required by this article with the general election.