An official website of the United States government.

This is not the current EPA website. To navigate to the current EPA website, please go to www.epa.gov. This website is historical material reflecting the EPA website as it existed on January 19, 2021. This website is no longer updated and links to external websites and some internal pages may not work. More information »

Vehicle and Engine Certification

CDX Document Upload Instructions for Nonroad Engine Manufacturers

The following document provides information on the steps to be followed for data submittal after the company's CDX account is established and ready for use.