CARB Moves To Speed Truck NOx Rule Fixes As Imminent EPA Waiver Stalls

March 23, 2023
The California Air Resources Board (CARB) has quietly approved a resolution giving Executive Officer Steve Cliff the authority to quickly relax the board’s heavy truck low-nitrogen oxide (NOx) “omnibus” standards for model years 2024-26, changes the board is making to address industry concerns while asking EPA to delay its imminent decision waiving federal preemption while it amends the rules. The March 23 CARB action seeks to expedite the regulatory changes rather than conducting a formal rulemaking process, which may indicate...

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