Official websites use .gov
A .gov website belongs to an official government organization in the United States.

Secure .gov websites use HTTPS
A lock () or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.

JavaScript appears to be disabled on this computer. Please click here to see any active alerts.

Direct Final Rule: Amendments to Emission Requirements Applicable to New Nonroad CI Engines at or Above 37 Kilowatts: Provisions for Replacement CI Engines and the Use of On-Highway CI Engines in Nonroad Vehicles

Rule Summary

These amendments adopt the original replacement-engine exemption for nonroad engines. These amendments also allow nonroad vehicle manufacturers to use certified highway engines in nonroad vehicles in certain circumstances.

Direct Final Rule: Control of Air Pollution; Amendments to Emission Requirements Applicable to New Nonroad Compression-Ignition Engines at or Above 37 Kilowatts: Provisions for Replacement Compression-Ignition Engines and the Use of On-Highway Compression Ignition Engines in Nonroad Vehicles (pdf) (136 KB, published November 12, 1996)

Direct Final Rule: Amendments to Emission Requirements Applicable to New Nonroad CI Engines at or Above 37 Kilowatts: Provisions for Replacement CI Engines and the Use of On-Highway CI Engines in Nonroad Vehicles

Rule Summary

Regulations for Emissions from Vehicles and Engines