Washington Revised Code Title 43. State Government--Executive § 43.21A.430. Catalytic converters in police, ambulance or emergency aid vehicles--Department's powers restricted in respect thereto

The department of ecology may not adopt, maintain in effect, or enforce any rule requiring the installation or maintenance of a catalytic converter in the exhaust system of any motor vehicle used as a police vehicle, or ambulance, an emergency aid vehicle, or a fire department vehicle, and any catalytic converter in the exhaust system of any such vehicle may be lawfully removed.