Washington Revised Code Title 46. Motor Vehicles § 46.65.900. Construction--Chapter supplemental

Nothing in this chapter shall be construed as amending, modifying, or repealing any existing law of Washington or any existing ordinance of any political subdivision relating to the operation or licensing of motor vehicles, the licensing of persons to operate motor vehicles or providing penalties for the violation thereof or shall be construed so as to preclude the exercise of regulatory powers of any division, agency, department, or political subdivision of the state having the statutory power to regulate such operation and licensing.