Rulemaking- Chapter 173-423 WAC Clean Vehicles Program Rulemaking: Draft Rule Language Feedback
Rulemaking Context:
On November 19, 2025, Ecology announced the Clean Vehicles Program rule to make amendments to Chapter 173-423 WAC. Washington law (RCW 70A.30.010) requires Ecology to adopt certain California regulations to maintain consistency with California’s emissions standards for new motor vehicles and engines. To date, Ecology has delivered on this Legislative requirement to adopt regulations consistent with the following California programs: Advanced Clean Cars, Advanced Clean Cars II, Advanced Clean Trucks, and Heavy-Duty Low NOx Omnibus standards. These regulations ensure that new motor vehicles sold in Washington pollute less, and they are an essential policy tool for addressing climate change and improving air quality – particularly in communities overburdened by vehicle emissions.
Comment Period:
Ecology is holding this comment period to gather your feedback on the draft rule language. We will use your input to help develop our rule language before proposing the rule and beginning the formal public comment process. The draft rule language can be found on our rule webpage.
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Rulemaking Context:
On November 19, 2025, Ecology announced the Clean Vehicles Program rule to make amendments to Chapter 173-423 WAC. Washington law (RCW 70A.30.010) requires Ecology to adopt certain California regulations to maintain consistency with California’s emissions standards for new motor vehicles and engines. To date, Ecology has delivered on this Legislative requirement to adopt regulations consistent with the following California programs: Advanced Clean Cars, Advanced Clean Cars II, Advanced Clean Trucks, and Heavy-Duty Low NOx Omnibus standards. These regulations ensure that new motor vehicles sold in Washington pollute less, and they are an essential policy tool for addressing climate change and improving air quality – particularly in communities overburdened by vehicle emissions.
Comment Period:
Ecology is holding this comment period to gather your feedback on the draft rule language. We will use your input to help develop our rule language before proposing the rule and beginning the formal public comment process. The draft rule language can be found on our rule webpage.
Contact Information
*Indicates Required Fields