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 Pollution Control Standards; Advanced Clean Cars II; Waiver of Preemption; Notice of Decision".

# Summary of HJRES 88 **What the bill does:** This bill reverses an EPA decision made in January 2025 that allowed California to enforce its "Advanced Clean Cars II" (ACC II) emissions standards. Under federal law, states generally cannot set their own vehicle emissions rules—the federal government does. However, California has a special exemption under the Clean Air Act allowing it to request waivers from this rule. The EPA had approved California's request, but this bill nullifies that approval, preventing California from implementing its stricter emissions standards. **Who it affects:** The bill primarily impacts California and automakers, as it blocks California from requiring vehicles sold in the state to meet stricter pollution and emissions limits than federal standards require.

Since California is the largest U.S. car market, automakers often design vehicles to meet California's standards, making this decision potentially significant for the auto industry nationwide and environmental policy. **Current status:** The bill has already been signed into law. This means California's Advanced Clean Cars II regulations cannot be enforced, and the state will need to follow federal emission standards instead.