You may use emission credits for purposes of certification to show compliance with the applicable fleet average NMOG+NOX standards from §§ 86.1811 and 86.1816 and the fleet average evaporative emission standards from § 86.1813 as described in 40 CFR part 1037, subpart H, with certain exceptions and clarifications as specified in this section. MDPVs are subject to the same provisions of this section that apply to LDT4.
EQUATION 1 TO PARAGRAPH (A)
Emission credit = Volume· [ Fleet average standard-Fleet average value]
Where:
Emission credit = The positive or negative credit for each discrete fleet average standard, in units of vehicle-grams per mile for NMOG+NOx and vehicle-grams per test for evaporative emissions.
Volume = Sales volume in a given model year from the collection of test groups or evaporative families covered by the fleet average value, as described in § 86.1860.
For example, credits you generate in model year 2018 may be used only through model year 2023.
40 C.F.R. §§86.1861-17