The lawsuit, filed by Daimler Truck North America, International Motors, Paccar and Volvo Group North America sought to make it so the companies don’t have to comply with the state emissions rules after recent federal government efforts to axe the state level requirements.

The companies argued that recent federal government resolutions “statutorily preempted California’s emissions standards governing heavy-duty vehicles and engines.”

“Notwithstanding that new legislation, California continues to demand compliance with its heavy-duty emissions standards,” the case stated.

In addition, the lawsuit asks the court to prevent the state from enforcing its “Clean Truck Partnership” with the companies under which they committed to meet California’s standards in exchange for the state loosening some requirements.

Read more here, from The Hill’s Sharon Udasin.