Regulations for Emissions from Vehicles and Engines

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.

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