Wash. Rev. Code § 89.30.043
If and when said county board finds that the petition is sufficient it shall enter an order to that effect and shall fix a time and place for a hearing on said petition which said time shall be not less than thirty days nor more than ninety days from the date of said order and shall direct the clerk of the board to publish notice of said hearing, setting forth the matters and things hereinafter required in a newspaper of general circulation published in each county in which any lands to be included in the district are situated. If there should be no newspaper of general circulation published in any county involved, then the county board shall designate some newspaper of general circulation published outside said county for the publication of said notice as to the lands situated in said county.
RCW 89.30.043