Washington Revised Code Title 53. Port Districts § 53.04.085. Petition for annexation to port district

If an area, not currently part of an existing port district desires to be annexed to a port district in the same county, upon receipt of a petition bearing the names of ten percent of the registered voters residing within the proposed boundaries of the area desiring to be annexed who voted in the last general municipal election, the commissioners of such port district shall petition the county legislative authority to annex such territory, as provided in RCW 53.04.080.