RCW 46.79.160
RCW 46.79.160: Catalytic converters—Inspection fee.
The license fees required under RCW 46.79.040 and 46.79.050 for a scrap processor's license must also include a $500 catalytic converter inspection fee, to be deposited in the state patrol highway account, in order to support the activities of the Washington state patrol under RCW 43.43.888 .