Washington Revised Code Title 46. Motor Vehicles § 46.37.600. Liability of operator, owner, lessee for violations

Whenever an act or omission is declared to be unlawful in chapter 46.37 RCW, if the operator of the vehicle is not the owner or lessee of such vehicle, but is so operating or moving the vehicle with the express or implied permission of the owner or lessee, then the operator and/or owner or lessee are both subject to the provisions of this chapter with the primary responsibility to be that of the owner or lessee.

If the person operating the vehicle at the time of the unlawful act or omission is not the owner or lessee of the vehicle, such person is fully authorized to accept the citation and execute the promise to appear on behalf of the owner or lessee.