The bill adds a new, temporary section to chapter 70A.30 RCW that creates an annual reporting requirement for the Joint Legislative Audit and Review Committee (JLARC). JLARC must consult with and receive data from the Department of Revenue (DOR) and the Department of Licensing (DOL) to produce reports on in-state sales of “regulated vehicles” (defined by reference to California’s advanced clean trucks regulations as adopted under chapter 70A.30 RCW) and on state and local sales and use tax collections associated with those in-state sales. This is a procedural law change establishing a new reporting obligation (not a new crime or penalty). The reports must include, at minimum, annual sales of regulated vehicles, annual state and local sales and use tax collections on those sales, any changes in those tax collections attributable to Washington implementing the advanced clean trucks regulations, and, as practicable, analyses of purchase price comparisons, comparable tax collection data from other states implementing the same regulations, and any information indicating changes in consumer behavior. JLARC’s first report is due June 1, 2027, with annual reports each June 1 through June 1, 2035; the added section expires June 1, 2036. The bill also includes legislative findings about ensuring accountability and data-driven policymaking related to implementation of the advanced clean trucks regulations and their effects on tax collections, and identifies JLARC, DOR, DOL, the Department of Ecology, taxpayers, industry stakeholders, and policymakers as relevant parties. The extracted text does not specify the exact new section number, the precise legislative committees that are “appropriate,” the specific vehicle models or classes covered beyond the California regulation reference, or technical details on data sources, formats, methodologies, privacy protections, or enforcement for agency cooperation.

If enacted, JLARC will need to produce an annual report from June 1, 2027 through June 1, 2035 on in-state sales of vehicles covered by Washington’s adoption of California’s advanced clean trucks rules, including counts of sales, the state and local sales and use taxes collected, any tax changes tied to those regulations, purchase price comparisons, and signs of changed consumer behavior. That will create a recurring workload for JLARC and require the Department of Revenue and the Department of Licensing to spend staff time and possibly other resources to gather and share the information, and it gives legislative committees new, regular revenue and market information to use when considering policy decisions about these vehicle rules and tax impacts. Key implementation details remain unclear from the text: the bill defines “regulated vehicle” only by referring to California’s regulations, it does not name which legislative committees will receive the reports, and it does not set out how DOR and DOL must supply data, what formats or privacy safeguards apply, or any enforcement for noncooperation. Those gaps mean the exact scope of agency effort and any costs or timing issues could vary depending on later decisions.