Any noncharter code city may be disincorporated. Proceedings may be initiated by the filing with the county auditor of a petition for disincorporation signed by a majority of the registered voters resident in such city, or the legislative body of the city may provide by resolution for an election on the proposition of disincorporation.
RCW 35A.15.010
Sufficiency of petition in code city: RCW 35A.01.040.