(1) Territory that is contiguously located to a special district may be annexed by the special district as provided in this section under the petition and election, resolution and election, or direct petition method of annexation.
(2) An annexation under the election method may be initiated by the filing of a petition requesting the action that is signed by at least ten owners of property in the area proposed to be annexed or the adoption of a resolution requesting such action by the governing body of the special district. The petitions shall be filed with the governing body of the special district that is requested to annex the territory. An election to authorize an annexation initiated under the petition and election method may be held only if the governing body approves the annexation. An annexation under either election method shall be authorized if the voters of the area proposed to be annexed approve a ballot proposition favoring the annexation by a simple majority vote. The annexation shall be effective when results of an election so favoring the annexation are certified by the county auditor or auditors. The election, notice of the election, and eligibility to vote at the election shall be as provided for the creation of a special district.
(3) An annexation under the direct petition method of annexation may be accomplished if the owners of a majority of the acreage proposed to be annexed sign a petition requesting the annexation, and the governing body of the special district approves the annexation. The petition shall be filed with the governing body of the special district. The annexation shall be effective when the governing body approves the annexation.
(4) Whenever a special district annexes territory under this section, the exclusive method by which the special district measures and imposes special assessments upon real property within the entire enlarged area shall be as set forth in RCW
85.38.150 through
85.38.170.