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  2. Regulations for Emissions from Vehicles and Engines

Direct Final Rule: Nonroad Diesel Technical Amendments and Tier 3 Technical Relief Provision

Direct Final Rule: Nonroad Diesel Technical Amendments and Tier 3 Technical Relief Provision
Basic Information
Code of Federal Regulations Citations
  • 40 CFR Part 9
  • 40 CFR Part 89
  • 40 CFR Part 1039
Docket Numbers
  • EPA-HQ-OAR-2007-0652

On this page:

  • Rule Summary
  • Additional Resources

Rule Summary

Related Regulations
  • Partial Withdrawal and Final Rule for the Nonroad Diesel Technical Amendments and Tier 3 Technical Relief Provision

In this rulemaking, EPA is making certain technical corrections to the rules establishing emission standards for nonroad diesel engines. In addition, we are amending those rules to provide nonroad diesel equipment manufacturers with a production technical relief provision for Tier 3 equipment which is similar to the technical relief provision already available for Tier 4 equipment.

  • Direct Final Rule (pdf) (4 pp, 216 KB, published September 18, 2007)

Additional Resources

Fact Sheet

  • Nonroad Diesel Technical Amendments and Tier 3 Technical Relief Provision (pdf) (3 pp, 99 KB, EPA-420-F-07-055, September 2007)

Regulations for Emissions from Vehicles and Engines

  • Onroad
    • Passenger Vehicles
    • Commercial Trucks & Buses
    • Motorcycles
  • Nonroad
    • Aircraft
    • Heavy Equipment
    • Locomotives
    • Marine
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  • Greenhouse Gas
Contact Us About Regulations for Emissions from Vehicles and Engines
Contact Us About Regulations for Emissions from Vehicles and Engines to ask a question, provide feedback, or report a problem.
Last updated on April 18, 2025
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