Oregon Adopts CARB’s ACT and Low-NOx Rules

On November 17, 2021, Oregon's Environmental Quality Commission adopted the California Air Resources Board's (CARB) Advanced Clean Trucks (ACT) rule and the Heavy-Duty Omnibus (Low NOx) rule.
CARB's ACT rule requires manufacturers to sell a certain percentage of heavy-duty engines starting with model year 2024 and medium- and heavy-duty zero emission trucks beginning with the 2025 model year. The Low NOx rule requires manufacturers producing heavy-duty vehicles to meet strict NOx emission standards to reduce the current NOx standard from 0.2 to 0.05 in 2024 and from 0.05 to 0.02 in 2027. In addition, Oregon has also adopted California's low emission vehicle (LEV) program which established new exhaust regulations for light- and medium-duty vehicles. 
Of particular interest to TRALA members is the one-time reporting requirement under Oregon's recently adopted ACT rule. This applies to businesses that run at least one facility in the state that own, operate, or dispatch 5 or more medium- and heavy-duty trucks. It also mandates that businesses with at least $50 million in 2021 gross annual revenue to report data related to the use of its fleets and locations by June 30, 2022.

TRALA had expected the adoption of these rules after Oregon had signed onto the Multi-State Medium- and Heavy-Duty Zero Emission Vehicle Memorandum of Understanding (MOU) which is a collaborative commitment, among 15 states and the District of Columbia, to advance a transition to 100% ZEVs. TRALA anticipates that Oregon's decision to adopt CARB's ACT and Low NOx rule will pave the way for other states to follow, especially those who signed onto the MOU. Currently, Maine, Massachusetts, New Jersey, New York, and Washington state are all considering the adoption of the ACT rule.
You may view a copy of the rulemaking by clicking here.
If you have any questions or need additional information, please contact TRALA's Elizabeth Hyers at or Andrew Stasiowski at