Certification and Compliance for Vehicles and Engines
-
Onroad
This section includes information on motorcycles, passenger cars and trucks, commercial trucks and buses.
-
Nonroad
This section includes aircraft, heavy equipment, locomotives, marine vessels, recreation vehicles and small equipment and tools.
-
EV-CIS
This section is for the Engines and Vehicles Compliance Information System (formerly Verify) for onroad and nonroad vehicles and engines.
How to get a copy of the Certificate of Conformity:
Manufacturer Information and Guidance Letters
Learn more about manufacturer information and guidance letters, including how to find them by year issued and how to get notified when new letters are issued.
Search for Documents
Search EPA's Transportation and Air Quality
database for documents:
database for documents:
In the DIS, you can find:
- Advisory circulars
- Applications for certification
- Certificates of conformity
- Certificate summary information reports
- Manufacturer guidance letters
- EV-CIS (formerly Verify) documentation