California Code, Water Code - WAT § 10710

Before a local agency may levy a water replenishment assessment as authorized in Section 10709 or may otherwise fix and collect rates for the extraction of groundwater pursuant to this part, the local agency shall hold an election on the proposition of whether or not the local agency shall be authorized to levy a water replenishment assessment or to fix and collect rates for the extraction of groundwater, and a majority of the votes cast at the election shall be in favor of the proposition.  The election shall be conducted in the manner prescribed by the principal act of the local agency.