Wash. Rev. Code § 84.33.230
Whenever forestland is removed from its forestland designation, the assessor of the county in which the land is located shall forthwith give written notice of the removal to the local government or its successor that filed with the assessor the notice required by RCW 84.33.210. Upon receipt of the notice from the assessor, the local government shall mail a written statement to the owner of the land for the amounts payable as provided in RCW 84.33.220. The amounts due shall be delinquent if not paid within one hundred eighty days after the date of mailing of the statement. The amount payable shall be subject to the same interest, penalties, lien priority, and enforcement procedures that are applicable to delinquent assessments on the assessment roll from which that land had been exempted, except that the rate of interest charged shall not exceed the rate provided in RCW 84.33.220.
RCW 84.33.230