Washington Revised Code Title 46. Motor Vehicles § 46.37.680. Sound system attachment

(1) All vehicle sound system components, including any supplemental speaker systems or components, must be securely attached to the vehicle regardless of where the components are located, so that the components cannot become dislodged or loose during operation of the vehicle.

(2) Enforcement of this section by law enforcement officers may be accomplished only as a secondary action when a driver of a vehicle has been detained for a suspected violation of this title or an equivalent local ordinance or some other offense.

(3) The Washington state traffic safety commission shall create and implement a statewide educational program regarding the safety risks of unsecured vehicle sound system components, including supplemental speaker systems or components. The educational program shall include information regarding securely attaching sound system components to the vehicle, regardless of where the components are located, so that the components do not become dislodged or loose during the operation of the vehicle. The commission shall create and implement this program within the commission's existing budget.