California State Nonroad Engine Pollution Control Standards; In-Use Diesel-Fueled Transport Refrigeration Units (TRU) and TRU Generator Sets and In-Use Off-Road Diesel Fueled Fleets; Requests for Authorization; Opportunity for Public Hearing and Comment

The California Air Resources Board (CARB) has notified the EPA that it has adopted amendments to its In-Use Diesel-Fueled Transport Refrigeration Units (TRU) and TRU Generator Sets (collectively, "TRU") regulations. By letter dated December 29, 2022, CARB requested that the EPA authorize the amendments pursuant to section 209(e) of the Clean Air Act (CAA). CARB has also notified EPA that it has adopted amendments to its In-Use Off-Road Diesel-Fueled Fleets ("Offroad Fleets") regulations. By letter dated November 2, 2023, CARB requested that the EPA authorize the amendments pursuant to section 209(e) of the CAA. This notice announces that the EPA will hold a public hearing to consider California's authorization requests and that the EPA is now accepting written comments on the requests.