California Code, Water Code - WAT § 36386.1

If, after the board adopts the resolution to issue the revenue warrants and before 30 days thereafter, the board receives a petition containing the signatures of persons holding title to 10 percent of the land area within the district, the board shall call an election of the qualified voters in the district and submit the resolution to issue revenue warrants to such voters for their approval or rejection.  The election required by this section shall be called and noticed, held, and conducted in the same manner provided for bond elections in the district, excepting that a majority of the votes cast in favor of such resolution shall be required for the approval of such resolution.