Compatible Vehicles definition
Compatible Vehicles means replacement vehicles that are the same as or substantially the same as vehicles being replaced, except that such replacement vehicles are CNG-fueled vehicles; provided that the vehicle being replaced consumes a sufficient amount of fuel to justify an economic return for an expected 7-year life of the vehicle from the replacement of such vehicle with a CNG-fueled vehicle, and that the conversion to CNG does not impede the operational use or performance of the vehicle.