California air quality officials have sued four truck manufacturers for breaching a voluntary agreement to follow the state’s nation-leading emissions rules, the state announced Tuesday.
What happened: Attorney General Rob Bonta’s office filed a complaint Monday in Alameda County Superior Court, arguing that the country’s four largest truck-makers — Daimler Truck North America, International Motors, Paccar and Volvo North America — violated an enforceable contract that they signed with the California Air Resources Board in 2023.
The lawsuit comes two months after the manufacturers filed their own complaint in federal court, arguing the agreement — known as the Clean Truck Partnership — is no longer valid after Republicans overturned California’s Advanced Clean Truck rule in June through the Congressional Review Act.
Why it matters: The move sets up a fight to determine whether the federal system or state courts — where CARB would have a higher likelihood of prevailing — will review the case.
