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  2. Regulations for Emissions from Vehicles and Engines

Partial Withdrawal and Final Rule for Nonroad Technical Amendments

Partial Withdrawal and Final Rule for Nonroad Technical Amendments
Basic Information
Code of Federal Regulations Citations
  • 40 CFR Part 1039
  • 40 CFR Part 1042
  • 40 CFR Part 1068
Docket Numbers
  • EPA-HQ-OAR-2012-0102

On this page:

  • Rule Summary
  • Rule History
  • Additional Resources

Rule Summary

Related Regulations
  • Direct Final Rule for Heavy-Duty Engine and Vehicle, and Nonroad Technical Amendments

EPA is adopting amendments to the technical hardship provisions under the Transition Program for Equipment Manufacturers related to the Tier 4 standards for nonroad diesel engines, and to the replacement engine exemption generally applicable to new nonroad engines. These provisions may have minor impacts on the costs and emission reductions of the underlying regulatory programs amended in this action, though in most cases these are simple technical amendments. For those provisions that may have a minor impact on the costs or benefits of the amended regulatory program, any potential impacts would be small and we have not attempted to quantify the potential changes.

  • Final Rule: Nonroad Technical Amendments (pdf) (270 KB, February 6, 2014)
  • Partial Withdrawal of Direct Final Rule: Heavy-Duty Engine and Vehicle and Nonroad Technical Amendments (pdf) (292 KB, published August 16, 2013)

Rule History

  • Proposed Rule and Related Materials

Additional Resources

  • Fact Sheet: EPA Re-Issues Amendments for Nonroad Engines and Equipment (pdf) (133 KB, EPA-420-F-14-002, January 2014)

Regulations for Emissions from Vehicles and Engines

  • Onroad
    • Passenger Vehicles
    • Commercial Trucks & Buses
    • Motorcycles
  • Nonroad
    • Aircraft
    • Heavy Equipment
    • Locomotives
    • Marine
    • Recreational Vehicles
    • Small Equipment & Tools
  • Greenhouse Gas
Contact Us About Regulations for Emissions from Vehicles and Engines
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Last updated on May 12, 2025
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