Large Spark-Ignition (LSI) Engine Fleet Requirements Regulation

This page last reviewed November 09, 2015


All documents are provided in chronological order in Adobe Acrobat (PDF), unless otherwise indicated.
Title Date
Frequently asked questions for Large Spark Ignition (LSI) Engine Fleet Requirements
July 31, 2008

Formal Regulatory Documents for the 2006 LSI Rulemaking:

February 1, 2007

Formal Regulatory Documents for the 2006 LSI Rulemaking:

December 8, 2006

Formal Regulatory Documents for the 2006 LSI Rulemaking:

December 1, 2006

Formal Regulatory Documents for the 2006 LSI Rulemaking:

  • Notice of Postponement to Consider Adoption of New Emission Standards, Fleet requirements, and Test Procedures for Forklifts and Other Industrial Equipment and all of the regulatory documents for this item, including the "Staff Report: Initial Statement of Reasons for Proposed Rulemaking" and its attachments.
April 26, 2006

Formal Regulatory Documents for the 2006 LSI Rulemaking:

  • Notice of Public Hearing to Consider Adoption of New Emission Standards, Fleet requirements, and Test Procedures for Forklifts and Other Industrial Equipment and all of the regulatory documents for this item, including the "Staff Report: Initial Statement of Reasons for Proposed Rulemaking" and its attachments
March 3, 2006

Formal Regulatory Documents for the 2005 LSI Rulemaking:

  • Notice of Public Hearing to Consider Adoption of Emission Standards and Test Procedures for New 2007 and Later Off-Road Large Spark-Ignition (LSI) Engines and Fleet Requirements for Users of Off-Road LSI Engines and all of the regulatory documents for this item, including the "Staff Report: Initial Statement of Reasons for Proposed Rulemaking" and its attachments
May 6, 2005

The Interim Verification Procedure For Retrofit Systems To Reduce Hydrocarbon And Oxides Of Nitrogen Emissions From Off-Road Large Spark-Ignition Engines And Equipment Greater Than 25 Horsepower

  • Verification Letter (PDF 84K)
    • Attachment 1: Verification Process (PDF 287K)
    • Attachment 2: Verification Process Flowchart (PDF 55K)
    • Attachment 3: Verification Testing Flowchart (PDF 56K)
April 18, 2005
Updated Draft Proposal to Reduce Emissions from Off-Road Large Spark-Ignition Equipment Greater Than 25 Horsepower March 16, 2005

Corrected Manufacturers Advisory Correspondence (MAC) 2005-01

March 16, 2005
Draft Proposal to Reduce Emissions from Off-Road Large Spark-Ignition Equipment Greater Than 25 Horsepower
(Updated due to typographical changes on page 14.)
August 19, 2004

Draft Proposal for a Retrofit Verification Protocol for Off-Road Large Spark-Ignition Equipment Greater Than 25 Horsepower:

August 17, 2004
Draft Retrofit Verification Protocol May 21, 2004
Draft Proposed Regulatory Concepts May 17, 2004
LSI Regulatory Options April 2004
LSI Site Visits April 2004
Refinement of Selected Fuel-Cycle Emissions Analyses April 20, 2001
LSI Emissions Inventory Methodology and Input Factors (MSC #98-27) October 22,1998