California Code, Public Resources Code - PRC § 33803

(a) The conservancy may raise revenues for any lawful purpose of the conservancy pursuant to this chapter.

(b) If the conservancy proposes to raise revenue by the levy of an assessment on real property or by the levy of any type of tax or increase in any existing tax authorized by this chapter, and the law authorizing the assessment or tax requires the approval of the electors of the conservancy, the assessment or tax may not be levied unless and until it is approved by the electors of the conservancy at an election held for that purpose.  Any assessment or tax levied by the conservancy shall be approved by two-thirds of the votes cast by the electors of the conservancy if the law authorizing the assessment or tax requires approval by two-thirds of the votes cast, or shall be approved by a majority of the votes cast by the electors of the conservancy if the law authorizing the assessment or tax provides for approval by a majority of the votes cast.

(c) Any election conducted by the conservancy shall be consolidated with a statewide election or any election conducted throughout the County of Riverside.