Final Rule for Standards for Emissions From Natural Gas-Fueled, and Liquefied Petroleum Gas-Fueled Motor Vehicles and Motor Vehicle Engines, and Certification Procedures for Aftermarket Conversions

Rule Summary

This rule provides emission standards and test procedures for the certification of new natural gas-fueled, and liquefied petroleum gas-fueled light-duty vehicles, light-duty trucks, heavy-duty engines and vehicles, and motorcycles. This rule also provides fuel economy test procedures and calculation equations for natural gas-fueled light-duty vehicles and trucks to allow these vehicles to be included in a manufacturer's corporate average fuel economy (CAFE). Finally, this rule provides procedures for the certification of aftermarket conversion equipment to allow a vehicle or engine to operate completely or in part on a fuel other than the fuel for which it was originally designed and manufactured.

• Final Rule(published September 21, 1994)