[(Fleet Average NOX Standard)-(Manufacturer's Fleet Average NOX Value)] * (Total Number of Tier 2 Vehicles Sold, Including ZEVs and HEVs).
Where: The number of Tier 2 vehicles sold is based on the point of first sale and does not include vehicles sold in California or a state that adopts, and has in effect for that model year, California emission requirements.
40 C.F.R. §§86.1861-04