The bill aims to enhance the energy efficiency of replacement tires for motor vehicles in Washington State by establishing new standards and regulations. It recognizes that high rolling resistance tires negatively impact fuel efficiency, costing drivers significantly in fuel expenses. The legislation empowers the Department of Commerce to adopt energy efficiency standards for replacement tires, which could lead to substantial savings in transportation costs and reductions in greenhouse gas emissions. The bill outlines definitions related to tire types and establishes a framework for the department to create a database, rating system, and testing procedures for replacement tires, ensuring that any new standards do not compromise safety or longevity.

Additionally, the bill includes provisions for enforcement, allowing the department to prohibit the sale of tires that do not meet the established standards and to impose civil penalties for violations. It also mandates that energy efficiency ratings be displayed to consumers at the point of sale. The legislation allows for the updating of rules by the Washington State Patrol to ensure compliance and clarity. If any part of the act is deemed invalid, the remaining provisions will still stand. Overall, the bill seeks to promote the use of low rolling resistance tires, thereby improving fuel efficiency and reducing environmental impact.