(1) "Safety chains" means flexible tension members connected from the front portion of the towed vehicle to the rear portion of the towing vehicle for the purpose of retaining connection between towed and towing vehicle in the event of failure of the connection provided by the primary connecting system, as prescribed by rule of the Washington state patrol.
(2) The term "safety chains" includes chains, cables, or wire ropes, or an equivalent flexible member meeting the strength requirements prescribed by rule of the Washington state patrol.
(3) A tow truck towing a vehicle and a vehicle towing a trailer must use safety chains. Failure to comply with this section is a class 1 civil infraction punishable under RCW 7.80.120
Tow trucks: Chapter 46.55