Wash. Admin. Code § 308-80-020
What are some improper uses of the transportation license plates? Issuance of transporter license plates under chapter 46.76 RCW does not authorize driving or towing of vehicles on the public highways for the following purposes or in the following manner:
(4) Failure to display plates as required under WAC 308-80-010.
This rule shall not be construed to prevent a determination that other uses of such plates are improper.
[Statutory Authority: RCW 46.76.070. WSR 00-13-018, § 308-80-020, filed 6/12/00, effective 7/13/00; Order MV 447, § 308-80-020, filed 9/16/77.]