Identify Equipment Subject to RegulationBased on the Regulation as of September 7, 2012
The California Air Resources Board's Off-Road regulation applies to the following in use engines/equipment:
Diesel engines 25 hp or larger that provide motive power.
Both engines of two-engine cranes, and two-engine water-well drilling rigs where the non-propulsion engine is 50 hp or larger.
Both engines of other two-engine vehicles where one engine provides motive power and the auxiliary engine is 50 hp or more and is not a Tier 0 engine.
Self-propelled workover rigs used to maintain oil and gas production wells.
The following equipment is exempt from the Off-Road regulation:
Commercial marine vessels;
Recreational off-highway vehicles;
Combat and tactical support equipment;
Portable engines, except for auxiliary engines in twin engine equipment. (Portable engines/equipment are designed to be moved, but the engine does not provide motive power. For example portable generators, compressors, concrete pumps, wood chippers, etc. Portable diesel engines 50 hp or larger are subject another ARB regulation.)
Equipment or vehicles used exclusively in agricultural operations;
Implements of husbandry;
Two-engine street sweepers subject to the Truck and Bus Regulation (Title 13, CCR, 2025);
Two-engine vehicles that are subject to the Fleet Rule for Public Agencies and Utilities(Title 13, CCR, sections 2022 and 2022.1);
Two-engine equipment excluding cranes and water-well drilling rigs that have Tier 0 auxiliary engines;
Equipment subject to the Regulation for Mobile Cargo Handling equipment at Ports and Intermodal Rail Yards (Title 13, CCR,); and
Off-road diesel vehicles owned and operated by an individual for personal, non-commercial, and non-governmental purposes.
You were required to report your fleet as it existed on Jan 1, 2009 by:
Large Fleet: April 1, 2009
Medium Fleet: June 1, 2009
Small Fleet: August 1, 2009
If you have a fleet that operated in California on Jan 1, 2009 and you did not report you will be subject to new fleet requirements.