RCW 48.19.501: Motor vehicle insurance—Anti-theft devices—Lights—Multiple vehicles.

Due consideration in making rates for motor vehicle insurance shall be given to:

(1) Any anticipated change in losses that may be attributable to the use of properly installed and maintained anti-theft devices in the insured private passenger automobile. An exhibit detailing these losses and any credits or discounts resulting from any such changes shall be included in each filing pertaining to private passenger automobile (or motor vehicle) insurance.

(2) Any anticipated change in losses that may be attributable to the use of lights and lighting devices that have been proven effective in increasing the visibility of motor vehicles during daytime or in poor visibility conditions and to the use of rear stop lights that have been proven effective in reducing rear-end collisions. An exhibit detailing these losses and any credits or discounts resulting from any such changes shall be included in each filing pertaining to private passenger automobile (or motor vehicle) insurance.

(3) Any anticipated change in losses per vehicle covered that may be attributable to the fact that the insured has more vehicles covered under the policy than there are insured drivers in the same household. An exhibit detailing these changes and any credits or discounts resulting from any such changes shall be included in each filing pertaining to private passenger automobile (or motor vehicle) insurance.