102 STAT. 2450
PUBLIC LAW 100-494—OCT. 14, 1988 average fuel economy would be if it were calculated by the formula in section 503(a)(1) and (2) by including as the denominator for each model type of dual energy automobile or natural gas dual energy automobile the fuel economy when such automobiles are operated on gasoline or diesel fuel. If the increase attributable to dual energy automobiles and natural gas dual energy automobiles for any model year described in subparagraph (A) is more than 1.2 miles per gallon, the limitation in subparagraph (A) shall apply, and if the increase attributable to such automobiles for any model year described in subparagraph (B) is more than 0.9 miles per gallon, the limitation in subparagraph (B) shall apply. "(2)(A) Notwithstanding any other provision of this section, if the Secretary reduces the average fuel economy standard applicable to passenger automobiles for any model year below 27.5 miles per gallon, any increase in average fuel economy for passenger automobiles of more than 0.7 miles per gallon to which a manufacturer of dual energy passenger automobiles or natural gas dual energy passenger automobiles would otherwise be entitled in that year under this section shall be reduced by an amount equal to the amount of such reduction in the standard, except that such increase shall not be reduced to less than 0.7 miles per gallon. "(B) In carrying out section 502(a)(4) and (f), the Secretary shall not consider the fuel economy of alcohol powered automobiles or natural gas powered automobiles, and the Secretary shall consider dual e n e i ^ automobiles and natural gas dual energy automobiles to be operated exclusively on gasoline or diesel fuel. "(h) DEFINITIONS.—(1) For purposes of this title— "(A) the term 'alcohol' means a mixture contsuning 85 percent or more by volume methanol, ethanol, or other alcohols, in any combination; "(B) the term 'alcohol powered automobile' means an automobile designed to operate exclusively on alcohol; "(C) the term 'dual energy automobile' means an automobile— "(i) which is capable of operating on alcohol and on gasoline or diesel fuel; "(ii) which provides equal or superior energy efficiency, as calculated for the applicable model year during fuel economy testing for the Federal Government, while operating on alcohol as it does while operating on gasoline or diesel fuel; "(iii) which, for model years 1993 through 1995, and, if the Administrator of the Environmental Protection Agency determines that an extension of this clause is warranted, for an additional period ending not later than the end of the last model year for which section 513(b) and (d) applies, provides equal or superior energy efficiency, as calculated for the applicable model year during fuel economy testing for the Federal Government, while operating on a mixture of alcohol and gasoline or diesel fuel containing exactly 50 percent gasoline or diesel fuel as it does while operating on gasoline or diesel fuel; and
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