RCW 35.01.020 Second-class city.A second-class city is a city with a population of fifteen hundred or more at the time of its organization or reorganization that does not have a charter adopted under Article XI, section 10, of the state Constitution, and does not operate under Title 35A RCW.
http://apps.leg.wa.gov/rcw/default.aspx?cite=35.01.020
