Diesel Regulations

Off Road

The off road regulations cover all self-propelled diesel equipment 25 HP and greater. 

On Road Diesel Vehicles

The on road diesel regulations cover all commercial diesel vehicles. It is a requirement for all vehicles with a GVWR of 26,001 and above to be reported in the CARB Truck and Bus Reporting System.

Agriculture

Section 2449(b) of the In-Use Off-Road Diesel Vehicle Regulation (off-road regulation) provides that all vehicles used exclusively for agricultural operations, including first processing after harvest, are exempt from all requirements in sections 2449, 2449.1, 2449.2 and 2449.3 of the off-road regulation. This document is designed to provide guidance for determining what activities will be designated as agricultural operations.

Portable Equipment

All portable diesel equipment 50 HP or greater has to be permitted by CARB or the local air district to be legal to run. Operating without a permit can lead to fines. 

TRUs

This regulation applies to in-use diesel fueled TRU's and TRU generator sets that operate in California, whether or not they are registered in California. This includes all carriers that transport perishable goods using diesel-powered refrigeration systems on trucks, trailers, shipping containers, and railcars that operate in this state.

Once a compliance deadline passes for a TRU's or TRU gen set model year, it is illegal to sell, offer for sale, lease, offer for lease, rent, or offer to rent a TRU for use in California that does not meet the current standards in the Air Toxic Control Measure (ATCM).

The deadline for in-use performance deadlines is as follows: Engines must be compliant by December 31st of the seventh (7th) year after the engine model year.

Example:  A 2003 model year engine must comply by December 31st, 2010.

Drayage Trucks

The regulation applies to all drayage trucks that operate at California’s ports and intermodal rail yards (regardless of the state or country they originated from). Drayage trucks are on-road diesel-fueled heavy-duty class 8 vehicles (GVWR greater than 33,000 lbs). 

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