Providing congressional disapproval under chapter 8 of title 5, United States Code, of the rule submitted by the Environmental Protection Agency relating to "California State Motor Vehicle and Engine and Nonroad Engine Pollution Control Standards; The 'Omnibus' Low NOX Regulation; Waiver of Preemption; Notice of Decision".

# Summary of HJRES 89 **What the Bill Does:** This bill cancels an EPA decision from January 2025 that allowed California to set its own strict pollution standards for heavy-duty trucks and engines. Under the Clean Air Act, California has special authority to request waivers that let it create stricter emission rules than federal standards. The EPA approved California's request for what's called the "Omnibus Low NOX Regulation," which targets nitrogen oxide pollution from diesel trucks and engines. This joint resolution uses Congress's power to reject federal regulations and reverses that EPA approval. **Who It Affects:** The bill primarily impacts California, which would lose the ability to enforce its stricter vehicle emission standards, and the trucking and engine manufacturing industries operating in or selling vehicles to California.

Environmental advocates who supported the stricter standards are also affected, as the rule would make it harder to reduce pollution from heavy-duty vehicles. Essentially, federal emission standards would now apply in California instead of California's stricter rules. **Current Status:** The bill has already been signed into law as of the summary date, meaning it has passed both the House and Senate and been approved by the President. California's low NOX regulation has been officially nullified.