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”.
Key claim: Congress revoked the EPA waiver that had allowed California to enforce its Omnibus Low NOx pollution-control standards for 2024 and later heavy-duty vehicles, off-road diesel engines, and auxiliary power units, enacting the disapproval as Public Law 119-17.
Abstract
(HJRES89 · 119th Congress) This joint resolution revokes the waiver granted to the California Air Resources Board regarding new emissions standards for new 2024 and subsequent model year on-road heavy-duty vehicles and engines, off-road diesel engines, and off-road diesel-fueled auxiliary power units. (Under the Clean Air Act, California may seek waivers of the preemption prohibiting states from enacting certain emission standards.) Specifically, the joint resolution nullifies the Environmental Protection Agency notice titled California State Motor Vehicle and Engine and Nonroad Engine Pollution Control Standards; The ‘Omnibus’ Low NOX Regulation; Waiver of Preemption; Notice of Decision . Latest action (2025-06-12): Became Public Law No: 119-17.
Why this matters
Public Law 119-17 is the second of a pair of Congressional Review Act disapprovals (alongside PL 119-16 against ACC II) that together revoke EPA’s Clean Air Act preemption waivers for California’s flagship vehicle emissions programs. For transportation, it directly affects the compliance regime for 2024-and-later heavy-duty trucks, off-road diesel engines, and auxiliary power units, restoring federal EPA standards as the operative ceiling and eliminating California (and Section 177 states’) ability to enforce the stricter Omnibus Low NOx limits.