Wash. Rev. Code § 89.30.049
Said notice shall state that a petition has been filed with said county board for the purpose of creating a reclamation district under the provisions of this chapter and may be inspected during office hours by any interested person, shall specify the boundaries of the district proposed in the petition, shall mention the time and place of hearing on said petition and shall state that all persons having or claiming any interest in said land, or any part thereof, and all persons otherwise interested are required at or before the time of said hearing to file in writing with the clerk of the county board such objections as they may have, if any, to the creation of said district. Said notice shall be signed by the clerk of the board.
RCW 89.30.049