California Code, Water Code - WAT § 20206

If the governing board does not entirely repeal the ordinance against which a petition is filed, the governing board shall submit the ordinance to the voters either at a regular election or a special election called for the purpose. The ordinance shall not become effective unless and until a majority of the votes cast at the election are cast in favor of it. If the ordinance is not approved by the voters, no new ordinance may be adopted by the governing board pursuant to this chapter for at least one year following the date of the election.