All such homes installed within the city shall contain the insignia of approval of the state of Washington or be exempt from said insignia, all pursuant to the standards of the state of Washington for the manufacture of such homes. (Ord. 1329 §5, 2009; Ord. 1225 §11, 2004; Ord. 1097 §33, 1999; Ord. 755 §1 (part), 1985).