Wash. Rev. Code § 57.24.240
(3) Upon the entry of the findings of the final hearing, each county legislative authority, if it finds the proposed annexation satisfies the requirements of subsection (2) of this section, shall give notice of a special election to be held within the boundaries of the territory proposed for annexation for the purpose of determining whether the same shall be annexed to the district. The notice shall:
[ 2007 c 31 s 2.]