((a)) ** .—** When the average fuel economy of passenger automobiles manufactured by a manufacturer in a particular model year exceeds an applicable average fuel economy standard under subsections (a) through (d) of section 32902 (determined by the Secretary of Transportation without regard to credits under this section), the manufacturer earns credits. The credits may be applied to—
((1)) any of the 3 consecutive model years immediately before the model year for which the credits are earned; and
((2)) to the extent not used under paragraph (1) any of the 5 consecutive model years immediately after the model year for which the credits are earned.
((b)) ** .—**
((1)) Except as provided in paragraph (2) of this subsection, credits under this section are available to a manufacturer at the end of the model year in which earned.
((2))
((A)) Before the end of a model year, if a manufacturer has reason to believe that its average fuel economy for passenger automobiles will be less than the applicable standard for that model year, the manufacturer may submit a plan to the Secretary of Transportation demonstrating that the manufacturer will earn sufficient credits under this section within the next 3 model years to allow the manufacturer to meet that standard for the model year involved. Unless the Secretary finds that the manufacturer is unlikely to earn sufficient credits under the plan, the Secretary shall approve the plan. Those credits are available for the model year involved if—
((i)) the Secretary approves the plan; and
((ii)) the manufacturer earns those credits as provided by the plan.
((B)) If the average fuel economy of a manufacturer is less than the applicable standard under subsections (a) through (d) of section 32902 after applying credits under subsection (a)(1) of this section, the Secretary of Transportation shall notify the manufacturer and give the manufacturer a reasonable time (of at least 60 days) to submit a plan.
((c)) ** .—** The number of credits a manufacturer earns under this section equals the product of—
((1)) the number of tenths of a mile a gallon by which the average fuel economy of the passenger automobiles manufactured by the manufacturer in the model year in which the credits are earned exceeds the applicable average fuel economy standard under subsections (a) through (d) of section 32902; times
((2)) the number of passenger automobiles manufactured by the manufacturer during that model year.
((d)) ** .—** The Secretary of Transportation shall apply credits to a model year on the basis of the number of tenths of a mile a gallon by which the manufacturer involved was below the applicable average fuel economy standard for that model year and the number of passenger automobiles manufactured that model year by the manufacturer. Credits applied to a model year are no longer available for another model year. Before applying credits, the Secretary shall give the manufacturer written notice and reasonable opportunity to comment.
((e)) ** .—** Credits for a manufacturer of automobiles that are not passenger automobiles are earned and applied to a model year in which the average fuel economy of that class of automobiles is below the applicable average fuel economy standard under , to the same extent and in the same way as provided in this section for passenger automobiles.
((f))
((1)) ** .—** The Secretary of Transportation may establish, by regulation, a fuel economy credit trading program to allow manufacturers whose automobiles exceed the average fuel economy standards prescribed under section 32902 to earn credits to be sold to manufacturers whose automobiles fail to achieve the prescribed standards such that the total oil savings associated with manufacturers that exceed the prescribed standards are preserved when trading credits to manufacturers that fail to achieve the prescribed standards.
((2)) ** .—** The trading of credits by a manufacturer to the category of passenger automobiles manufactured domestically is limited to the extent that the fuel economy level of such automobiles shall comply with the requirements of section 32902(b)(4), without regard to any trading of credits from other manufacturers.
((g))
((1)) ** .—** The Secretary of Transportation shall establish by regulation a fuel economy credit transferring program to allow any manufacturer whose automobiles exceed any of the average fuel economy standards prescribed under section 32902 to transfer the credits earned under this section and to apply such credits within that manufacturer’s fleet to a compliance category of automobiles that fails to achieve the prescribed standards.
((2)) ** .—** Credits transferred under this subsection are available to be used in the same model years that the manufacturer could have applied such credits under subsections (a), (b), (d), and (e), as well as for the model year in which the manufacturer earned such credits.
((3)) ** .—** The maximum increase in any compliance category attributable to transferred credits is—
((A)) for model years 2011 through 2013, 1.0 mile per gallon;
((B)) for model years 2014 through 2017, 1.5 miles per gallon; and
((C)) for model year 2018 and subsequent model years, 2.0 miles per gallon.
((4)) ** .—** The transfer of credits by a manufacturer to the category of passenger automobiles manufactured domestically is limited to the extent that the fuel economy level of such automobiles shall comply with the requirements under section 32904(b)(4), without regard to any transfer of credits from other categories of automobiles described in paragraph (6)(B).
((5)) ** .—** A credit may be transferred under this subsection only if it is earned after model year 2010.
((6)) ** .—** In this subsection:
((A)) ** .—** The term “fleet” means all automobiles manufactured by a manufacturer in a particular model year.
((B)) ** .—** The term “compliance category of automobiles” means any of the following 3 categories of automobiles for which compliance is separately calculated under this chapter:
((i)) Passenger automobiles manufactured domestically.
((ii)) Passenger automobiles not manufactured domestically.
((iii)) Non-passenger automobiles.
((h)) ** .—** When a civil penalty has been collected under this chapter from a manufacturer that has earned credits under this section, the Secretary of the Treasury shall refund to the manufacturer the amount of the penalty to the extent the penalty is attributable to credits available under this section.