On June 12, 2025, the President signed into law three joint resolutions (H.J. Res. 87, H.J. Res. 88, and H.J. Res. 89) that disapprove specific regulations issued by the Environmental Protection Agency (EPA). These resolutions address California’s standards for motor vehicle and engine pollution control, including provisions related to heavy-duty vehicles, advanced clean trucks, and emissions standards for nonroad engines. By signing these resolutions, the administration has formally rejected the EPA’s rules concerning state-level environmental regulations, which impacts California’s approach to pollution control and vehicle emissions.

H.J. Res. 87 specifically disapproves regulations on heavy-duty vehicle emissions and includes provisions regarding maintenance and warranty. H.J. Res. 88 targets California’s Advanced Clean Cars II regulations, while H.J. Res. 89 disapproves the EPA’s omnibus low NOX regulation and other pollution control standards for both on-road and nonroad engines. These actions signify a significant federal response to state environmental initiatives, particularly those from California, which often leads the nation in strict environmental policies.

The signing of these resolutions has implications for the future of environmental regulation in the United States, potentially altering the balance of state versus federal authority in setting pollution standards. This development emphasizes ongoing discussions about the relationship between environmental protection and regulatory oversight at both the state and federal levels. As the situation evolves, it will be essential to observe how these changes affect environmental policy and the automotive industry’s response to emission standards.

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