Wash. Rev. Code § 87.52.030
Upon the delivery of said petition the board of directors of said irrigation district shall, at their next succeeding regular monthly meeting, order an election, the date of which election shall be within twenty days from the date of said meeting of the board of directors and which election shall be conducted as other elections of irrigation districts are conducted. At said election the qualified electors of said irrigation district shall cast ballots which shall contain the words "Disorganize, Yes," or "Disorganize, No." No person shall be entitled to vote at any election held under the provisions of RCW 87.52.010 through 87.52.060 unless he or she is a qualified voter under the election laws of the state, and holds title or evidence of title to land in said district.
RCW 87.52.030
Irrigation district elections: RCW 87.03.030 through 87.03.110.
Voter registration: Chapter 29A.08 RCW.