Providing for 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".

This measure would overturn an EPA decision that let California enforce its stricter “Omnibus Low NOx” rules for heavy‑duty vehicle and engine emissions. The EPA’s notice had granted California a waiver so the state could apply these stronger standards; this resolution would nullify that notice, removing the waiver approval . The EPA notice at issue is titled “California State Motor Vehicle and Engine and Nonroad Engine Pollution Control Standards; The Omnibus Low NOX Regulation; Waiver of Preemption; Notice of Decision” .

If this becomes law, California would no longer have that federal approval to enforce its “Omnibus Low NOx” requirements for heavy‑duty vehicles and engines, because the underlying EPA decision would be canceled .

• Who is affected: California’s air regulators and makers/operators of heavy‑duty vehicles and engines in California (due to the waiver for those rules)
• What changes: The EPA’s approval of California’s waiver for its heavy‑duty “Omnibus Low NOx” standards would be undone
• When: The EPA notice being targeted was published January 6, 2025; the resolution would nullify that notice if enacted