RCW 46.76.060: Display of plates, indicator tabs—Nontransferability.

Transporter's license plates or indicator tabs pursuant to RCW 46.55.065 must be conspicuously displayed on all vehicles being delivered by the driveaway or towaway methods or being driven on the public roads of the state for the purpose of repair evaluation. These plates or indicator tabs must not be loaned to or used by any person other than the holder of the license or his or her employees. If a transporter license plate or indicator tab is lost, stolen, or damaged, the holder of the license must report the event to the department within 10 days of discovering that the transporter license plate or indicator tab has been lost, stolen, or damaged.