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Vehicle and Engine Certification

Hardship Relief for Participants in the Transition Program for Equipment Manufacturers (TPEM) of Heavy Equipment


When current TPEM participants face unusual circumstances that cause technical or economic hardship, EPA regulations provide opportunities for additional allowances through hardship relief.

For information on TPEM, click the tab above or the following link:

If granted, the amount of hardship relief may depend on the applicant's circumstances and the type of relief requested. 

Regulatory Requirements and Recordkeeping

Requirements for hardship relief depend on the type of relief.

There are two types of relief:
  1. Technical or engineering hardship relief; and
  2. Economic hardship relief.
Learn more about:

Who can participate

Hardship relief is available to equipment manufacturers who:
  • Manufacture heavy equipment;
  • Are already participating in TPEM;
  • Are not in violation of TPEM regulations and the allowance they selected;
  • Meet the requirements for the type of hardship relief they are seeking;
  • Can demonstrate that their company will face hardship when their regular TPEM allowances run out;
  • Can demonstrate that alternate engine suppliers could not ease or eliminate the impending hardship; and
  • Can demonstrate that the impending hardship:
    • Is not their fault;
    • Is outside of their control; and
    • Could not be avoided by prudent planning.

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How to Apply

Complete the following five steps:

Number OneDetermine whether you qualify.

Fill out the following pre-screening document. Only proceed to the next step if you qualify.

•  Pre-Screening Tool for Hardship Relief

Number TwoFill out additional paperwork.

If you qualify for hardship relief, fill out the following form.

•  Application Questionnaire for TPEM Hardship Relief Request

""Assemble application package.

Make sure your package includes all items listed below. Incomplete packages will not be processed.

Materials for Application Package

Please provide PDF copies of:

""Submit your completed application package.

In order to expedite processing, increase efficiency, and decrease environmental impact, EPA prefers submission by email.

Method Contact Information
(EPA's preferred method)
US Postal Service or Courier Mail*
(includes mail or delivery by FedEx, UPS, etc.)
Director, Diesel Engine Compliance Center
U.S. Environmental Protection Agency
Office of Transportation & Air Quality
2000 Traverwood Drive
Ann Arbor, MI 48105
Verify Submission Currently NOT available

Submissions that are mailed or delivered may experience processing delays.

""EPA's review process.

EPA conducts reviews in two phases. You may not start using any additional allowances until you have received official notification of EPA's decision at the end of Phase 2.

Phase Description of Process Duration
Phase 1
Preliminary review is conducted to determine:
  • Whether your application is complete; and
  • Meets pre-screening requirements.
Duration of this phase depends on your ability to submit a complete application.
Phase 2
This phase:
  • Includes an in-depth review of all components of the application;
  • May include requests for more information; and
  • Will end in an official letter to the applicant indicating EPA's final decision.
Lasts between 45 and 70 business days.

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Help Desk for TPEM Hardship Relief

For questions about TPEM hardship relief, contact the help desk. Please note that this help desk is different than the general TPEM Help Desk.

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