42 U.S. Code § 8521 - Minimum automobile fuel purchase measures
In applying subsection (a) of this section in the case of any vehicle with an engine having 8 cylinders (or more), “$7.00” shall be substituted for “$5.00”.
The requirements of subsection (a) of this section shall not apply to any motorcycle or motorpowered bicycle, or to any comparable vehicle as may be determined by the Secretary by regulation.
The Secretary may increase the $5.00 and $7.00 amounts specified in subsections (a) and (b) of this section if the Secretary considers it appropriate. Adjustments under this subsection shall be only in even dollar amounts.
 See References in Text note below.
The Emergency Petroleum Allocation Act of 1973, referred to in subsec. (h)(1), is Pub. L. 93–159, Nov. 27, 1973, 87 Stat. 628, as amended, which was classified generally to chapter 16A (§ 751 et seq.) of Title 15, Commerce and Trade, and was omitted from the Code pursuant to section 760g of Title 15, which provided for the expiration of the President’s authority under that chapter on Sept. 30, 1981.