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 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 This website is no longer updated and links to external websites and some internal pages may not work.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

Sponsor letter for Engines and Vehicles Compliance Information System (EV-CIS) Submitter and CROMERR Signer

EPA must collect this information to ensure compliance with the Cross-Media Electronic Reporting Rule (CROMERR).

The sponsor letter identifies the EV-CIS submitter(s) and CROMERR signer(s). It is signed by the Company Authorizing Official (CAO) on company letterhead. This letter is only used to identify EV-CIS submitters and CROMERR signers.

Free Viewers