H.R. 2218 — Stop CARB Act of 2025

This section repeals Clean Air Act (CAA) §209(b), which authorizes the EPA administrator to waive federal preemption for California to adopt vehicle emission standards (with other states then permitted to adopt California's standards), and strikes related provisions. It voids all waivers granted under former §209(b) as of enactment and deems any pending waiver applications denied. The section further prohibits states and localities from adopting or enforcing emission standards for new nonroad engines or vehicles used in construction equipment or vehicles, farm equipment or vehicles, or locomotives; redesignates CAA §209(c) and (d) as subsections (b) and (c); and makes conforming amendments to CAA §§202, 211, 241-244, and 247 to remove references to the repealed waiver authority and related California-specific provisions.

This section repeals Section 177 of the Clean Air Act, which authorizes states other than California to adopt and enforce emission standards for new motor vehicles or engines that are identical to California standards (for which EPA has granted a waiver under CAA Section 209) if adopted at least two years before the model year. (Thus, such states lose authority to adopt or enforce those standards.) It also strikes the second sentence of CAA Section 249(e)(3) as a conforming amendment.