Washington Revised Code Title 46. Motor Vehicles § 46.16A.150. Purchasing a vehicle with foreign plates

(1) The out-of-state vehicle is sold to a Washington resident by a resident of a jurisdiction where the license plates follow the owner;

(2) The out-of-state license plates may be returned to the jurisdiction of issuance by the owner for refund purposes; or

(3) For other reasons as determined by the department by rule.