California
Congress Overturns California Low NOx Regulation on Heavy-Duty Vehicles
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Key points
- President Trump signed H.J. Res. 89 into law, nullifying California’s heavy-duty vehicle emissions waiver.
- Congress passed the resolution under the Congressional Review Act to protect the national trucking industry from state-level overreach.
- The legislative action officially strips California’s “Omnibus” Low NOx regulation of all legal force.
NewsWK — A new federal law blocks California from imposing strict emissions rules on heavy-duty trucks nationwide. President Donald J. Trump signed a resolution to nullify a controversial environmental waiver.
Why it matters
This decision curbs state-level regulatory reach over the national trucking industry. By blocking the rule, officials prevent potential supply chain disruptions. Therefore, consumers across the United States may avoid rising shipping costs.
California Omnibus Low NOx Regulation Overturned by Federal Lawmakers
Congress used the Congressional Review Act to dismantle the federal waiver. This waiver allowed California to enforce its strict heavy-duty vehicle emissions standards. President Trump finalized the rollback by signing House Joint Resolution 89 into law. This action officially strips the environmental regulation of all legal force and effect.
Representative Jay Obernolte (R-CA-23) introduced the resolution on April 2, 2025. The measure targeted an Environmental Protection Agency (EPA) waiver published on January 6, 2025. That waiver had granted California permission to enforce its “Omnibus” Low NOx rules. However, federal lawmakers intervened to protect interstate commerce.
Trump Signs HJ Res 89 to Finalize Rollback
President Trump signed the joint resolution on June 12, 2025, enacting it as Public Law 119-17. The signing followed swift legislative action in both chambers of Congress during the spring. This signature successfully halted the implementation of the California heavy duty vehicle emissions waiver.
The legislative timeline moved quickly through the 119th Congress to block the EPA’s overreach:
- April 2, 2025: Representative Obernolte introduced the resolution in the House.
- April 30, 2025: The House of Representatives passed the measure with broad support.
- May 22, 2025: The Senate approved the bill in a tight 49–46 vote.
- June 12, 2025: The president signed the law, officially enacting Public Law 119-17.
This article was produced with the assistance of AI and reviewed by our editorial team.
Sources
Related: California Emissions Lawsuit: Trump Administration Effort to Revoke Auto Rules Challenged
Related: House Resolution 1499 Clears Way for Critical Votes on Mining, Higher Education, and Maritime Rules
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