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  1. Home
  2. Vehicle and Engine Certification

Certification and Compliance for Nonroad Vehicles and Engines

Letter to portable fuel container manufacturers.

Aircraft

  • Compliance reporting for aircraft

All-Terrain Vehicles (ATVs) and Dirt Bikes

  • Certification for ATVs and dirt bikes
  • Compliance reporting for ATVs and dirt bikes

Locomotives

  • Certification for locomotives
  • Compliance reporting for locomotives

Marine Compression-Ignition (CI) Engines

  • Certification for marine compression-ignition (CI) engines
  • Compliance reporting for marine CI engines

Nonroad CI Engines

  • Certification for nonroad CI
  • Compliance reporting for nonroad CI
  • Confirmatory testing
  • Transition Program for Equipment Manufacturers (TPEM)
  • Hardship relief for TPEM participants

Nonroad Spark-Ignition (SI) Engines

(Includes large SI, small SI, marine SI, and evaporative)
  • Certification for nonroad SI
  • Compliance reporting for nonroad SI
  • Confirmatory testing

Portable Fuel Containers

  • Certification for portable fuel containers
  • Compliance reporting for portable fuel containers
  • EPA has issued a letter to all portable fuel container (PFC or gas can) manufacturers to clarify that vents are allowed under EPA regulations and to encourage product designs that restore consumer convenience.  Clarification on Vents in Portable Fuel Containers Under EPA Regulations (pdf) (258.26 KB, July 24, 2025)

Snowmobiles

  • Certification for snowmobiles
  • Compliance reporting for snowmobiles

Vehicle and Engine Certification

  • Onroad
  • Nonroad
  • EV-CIS
Contact Us about Vehicle and Engine Certification
Contact Us about Vehicle and Engine Certification to ask a question, provide feedback, or report a problem.
Last updated on July 24, 2025
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