When an ordinance is passed as provided in RCW 35A.07.020 or 35A.07.030, the clerk of the charter city shall forward to the secretary of state a certified copy thereof. Upon the filing of the certified copy of the ordinance in the office of the secretary of state, such city shall be classified as a charter code city and shall thereafter be governed under the provisions of this optional municipal code and have the powers conferred hereby.
RCW 35A.07.040