The bill introduces a new section to chapter 43.21C RCW, categorically exempting decisions related to the development or extension of trails or paths from compliance with the state environmental policy act. This exemption applies if the surface area of the proposed trail or path does not exceed 10 acres and is located on a railroad right-of-way designated for interim trail use within a city with a population of 500,000 or more. The bill also mandates that applicants must engage in meaningful consultation with any potentially affected federally recognized tribes prior to submitting an application for development, ensuring discussions about cultural resources and tribal treaty rights.

Additionally, the bill outlines the notification process for affected tribes, requiring at least two methods of communication, including mail. If a tribe does not initiate consultation within 90 days of receiving notice, the exemption will take effect. The bill clarifies that improvements related to the trails and paths, such as utilities and support infrastructure, are included in this exemption, while unrelated infrastructure improvements are not covered. This new section is intended to streamline the process for trail development while respecting tribal rights and cultural resources.