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Annual Reporting for the Large Spark-Ignition (LSI) Engine Fleet Requirements Regulation

Wednesday, June 6, 2018  
Posted by: Tino Vasquez
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Annual Reporting for the Large Spark-Ignition (LSI) Engine Fleet Requirements Regulation

The Large Spark-Ignition (LSI) Engine Fleet Requirements Regulation (LSI Regulation) requires all operators that are required to report their equipment to CARB pursuant Cal. Code Regs., Title 13, § 2775.1 (a)(5) of the LSI Regulation to submit an annual attestation between June 1 and June 30. 

For each annual attestation, a fleet must report any changes to the fleet, hour meter readings for limited hours of use vehicles, and an attestation that the information is true, accurate, and complete.  To assist fleets with compliance, CARB developed an electronic attestation tool in DOORS, the on-line reporting tool.  The electronic attestation is now available for fleets to access.  CARB provides the electronic attestation as a convenience for fleet operators.

General information about the LSI Regulation is available on our website.  LSI Guidance Documents and Advisories provides many documents intended to assist fleets with their compliance efforts.  These guidance documents do not alter or modify the terms of the LSI Regulation, nor do they constitute legal advice. 


For questions regarding the LSI Regulation and reporting, please contact the DOORS Hotline at (877) 59DOORS (877-593-6677) or


The LSI Fleet Regulation applies to operators of forklifts, sweeper/scrubbers, industrial tow tractors, and airport ground support equipment.  These vehicles are found in approximately 2,000 LSI fleets in California in industries as diverse as manufacturing, wholesale, transportation and utilities, retail, services, and construction, as well as public agencies.   

The 2006 LSI rulemaking and 2010 amendments required operators of in-use fleets to achieve specific oxides of nitrogen + hydrocarbon fleet average emission limit (FAEL) standards that became more stringent over time, operators were required to meet the most stringent standard in 2013.  The 2016 amendments require operators of in-use fleets to report, label LSI equipment, and continue existing recordkeeping requirements previously set to expire June 30, 2016. © Southern California Contractors Association All rights reserved.

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