Wash. Rev. Code § 36.70.795
A board that adopts a moratorium, interim zoning map, interim zoning ordinance, or interim official control without holding a public hearing on the proposed moratorium, interim zoning map, interim zoning ordinance, or interim official control, shall hold a public hearing on the adopted moratorium, interim zoning map, interim zoning ordinance, or interim official control within at least sixty days of its adoption, whether or not the board received a recommendation on the matter from the commission or department. If the board does not adopt findings of fact justifying its action before this hearing, then the board shall do so immediately after this public hearing. A moratorium, interim zoning map, interim zoning ordinance, or interim official control adopted under this section may be effective for not longer than six months, but may be effective for up to one year if a work plan is developed for related studies providing for such a longer period. A moratorium, interim zoning map, interim zoning ordinance, or interim official control may be renewed for one or more six-month periods if a subsequent public hearing is held and findings of fact are made prior to each renewal.
RCW 36.70.795