RCW 46.08.010: State preempts registration and licensing fields.

The provisions of this title relating to certificates of title, registration certificates, vehicle licenses, vehicle license plates, and drivers' licenses shall be exclusive and no political subdivision of the state of Washington shall require or issue any licenses or certificates for the same or a similar purpose, nor shall any city or town in this state impose a tax, license, or other fee upon vehicles operating exclusively between points outside of such city or town limits, and to points therein.