Wash. Admin. Code § 308-99-060
Is there vehicle license reciprocity for rental or leased vehicles? Yes, unless there is an agreement or arrangement to the contrary. The classes of vehicles and circumstances indicated below are eligible for reciprocity:
(1) Passenger cars and motor homes currently and properly registered in another jurisdiction will be granted vehicle license reciprocity in this state if:
(2) Trailers and semi-trailers with a gross vehicle weight in excess of 6,000 pounds, trucks, truck tractors, tractors, and road tractors that are currently and properly registered in other jurisdictions will be granted vehicle license reciprocity in this state if:
[Statutory Authority: RCW 46.01.110. WSR 05-01-048, § 308-99-060, filed 12/7/04, effective 1/7/05; WSR 00-20-064, § 308-99-060, filed 10/3/00, effective 11/3/00.]