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  2. Regulations for Emissions from Vehicles and Engines

Proposed Rule and Related Materials for Control of Emissions of Air Pollution from 2004 and Later Model Year Heavy-Duty Highway Engines and Vehicles; Revision of Light-duty Truck Definition

Related Topics
  • Final Rule for Control of Emissions of Air Pollution from 2004 and Later Model Year Heavy-Duty Highway Engines and Vehicles; Revision of Light-Duty On-Board Diagnostics Requirements

Following is information for the proposed rule for Control of Emissions of Air Pollution from 2004 and Later Model Year Heavy-Duty Highway Engines and Vehicles; Revision of Light-duty Truck Definition.

  • Proposed Rule (pdf) (1.32 MB, published October 29, 1999)

Related Materials

  • Fact Sheet: Proposed Strategy to Reduce Emissions from Heavy Duty Vehicles (pdf) (16.2 KB, EPA420-F-99-034, October 1999)

Regulations for Emissions from Vehicles and Engines

  • Onroad
    • Passenger Vehicles
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  • Nonroad
    • Aircraft
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  • Greenhouse Gas
Contact Us About Regulations for Emissions from Vehicles and Engines
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Last updated on May 19, 2025
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