Wash. Rev. Code § 57.04.130
Any sewerage improvement district which has been operating as a sewer district shall be a district under this title as of March 16, 1979, upon being so ordered by the county legislative authority of the county in which such district is located after a hearing of which notice is given by publication in a newspaper of general circulation within the district and mailed to any known creditors, holders of contracts, and obligees at least thirty days prior to such hearing. After such hearing if the county legislative authority finds that the sewerage improvement district was operating as a district and that the converting of such district will be in the best interest of that district, it shall order that such sewer improvement district shall become a district immediately upon the passage of the resolution containing such order. The debts, contracts, and obligations of any sewerage improvement district which has been erroneously operating as a district are recognized as legal and binding. The members of the government authority of any sewerage improvement district which has been operating as a district and who were erroneously elected as sewer district commissioners shall be recognized as the governing authority of a district. The members of the governing authority shall continue in office for the term for which they were elected.
RCW 57.04.130
Part headings not law-Effective date-1996 c 230: See notes following RCW 57.02.001.