The bill proposes the introduction of a special license plate series featuring an image of Mount St. Helens, which will be added to the existing special license plates approved by the Washington Department of Licensing. The new Mount St. Helens license plate will have an initial fee of $40.00 and a renewal fee of $30.00. It also amends existing laws to ensure that funds generated from these special plates are allocated to promote education, stewardship, and science at Mount St. Helens through the Mount St. Helens Institute. Additionally, the bill reenacts and amends several sections of the Revised Code of Washington (RCW) to incorporate the new license plate and its associated fees, while updating the administration and collection of special license plate fees to support various programs, including those for volunteer firefighters and cancer research.

Moreover, the bill establishes eligibility criteria for cities to receive construction funds for public tennis facilities, requiring that the city does not already have a facility with at least four indoor tennis courts. Funds will be allocated to the most populous eligible city based on the latest census, with a five-year window starting from January 1, 2017, for subsequent allocations. Maintenance funds will be prioritized for the first city that utilizes the construction funds. The bill also specifies that at least 90 percent of funds from the Seattle Seahawks and Seattle Mariners accounts must be allocated to fellowships and youth services, respectively, and introduces a definition for the "Mount St. Helens license plate." The act is set to take effect on November 1, 2025.