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DOORS reporting system link and banner
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Off-Road Diesel Regulation Page
Applies to in-use off-road heavy-duty diesel vehicles with engines of 25 hp or greater operating in California for commercial use.
 

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Large Spark Ignition (LSI) Regulaton Page
Applies to large spark-ignited engines (gasoline, propane, and CNG fuel) 25 horsepower and greater and greater than 1 liter displacement, operating in California.
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Portable Equipement (PERP) Regulation Page
Available to owners of portable engines and other types of equipment to register under the Statewide Portable Equipment Registration Program (PERP).
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