This bill amends RCW 41.26.030 to include full-time wildland or aviation firefighters in the law enforcement officers' and firefighters' retirement system. It defines "full-time" as employment for at least 160 hours in a month for more than six months in a year and expands the definition of "employer" to include the Department of Natural Resources for qualifying firefighters. The bill also makes various reenactments and amendments to existing definitions within the retirement system, enhancing clarity regarding eligibility and benefits for different categories of firefighters and law enforcement officers.

Furthermore, the bill clarifies definitions related to the retirement system, including "Member," "Plan 1," "Plan 2," and "Service," establishing criteria for service credit and detailing how it is calculated for members, including those working for multiple employers. It also addresses the impact of furloughs or temporary layoffs on service credit and aligns definitions such as "State elective position" and "Surviving spouse" with the intended benefits and eligibility criteria. Overall, the bill aims to provide clearer guidelines for the administration of the retirement system and improve the retirement benefits available to wildland and aviation firefighters.