California receives 4 amendment authorizations
Effective date: January 2025 (dates vary by amendment)
This applies to: Entities subject to certain nonroad vehicle and engine emissions regulations under the California Air Resources Board (CARB)
Description of change: The Environmental Protection Agency granted four amendment authorizations to CARB, allowing the state to implement and enforce more stringent emission standards for certain off-road (nonroad) vehicles and engines.
Small Off-Road Engine (SORE) regulation
Nearly all new SOREs with Model Year (MY) 2024 or later must achieve zero emissions of hydrocarbons and NOx and zero evaporative emissions. Large pressure washers and portable generators must meet the same zero-emission standards starting with MY 2028.
Effective date: January 6, 2025
In-Use Off-Road Diesel-Fueled Fleets regulation
The amendments require fleets to replace older vehicles with newer ones gradually through 2036. The phaseout timeline is based on fleet size and MY. The rule also restricts fleets from adding older vehicles (with a timeline also based on fleet size and MY through 2035) and requires all fleets to use specific renewable diesel.
Effective date: January 10, 2025
Airborne Toxic Control Measure for In-Use Diesel-Fueled Transport Refrigeration Units (TRU) and TRU Generator Sets regulation
CARB’s rule imposes refrigerant use requirements for certain TRUs, sets particulate matter standards for non-truck TRUs, requires fleets to transition a percentage of TRUs to zero-emission technology refrigeration units (ZETRUs), and contains registration and reporting requirements for facilities with TRUs. The authorization, however, excludes CARB’s requirement for TRU owners to turn over 15 percent or more of its TRU fleet to ZETRUs by December 31, 2023, and each subsequent year.
In January 2025, CARB withdrew its authorization request for the rule’s mandate that TRU owners turn over 15 percent or more of their TRU fleet to ZETRUs by December 31, 2023, and each subsequent year.
Effective date: January 10, 2025
Commercial Harbor Craft regulation
EPA’s authorization excludes decisions on the Zero-Emission and Advanced Technologies standards for in-use short-run ferries and the standards for specific in-use engines and vessels with expiring feasibility extensions.
In January 2025, CARB withdrew its authorization request for the rule’s Zero-Emission and Advanced Technologies standards for in-use short-run ferries as well as the standards for specific in-use engines and vessels with expiring feasibility extensions.
Effective date: January 10, 2025