; and (B) not later than 36 months after such date of enactment, finalize regulations to carry out the amendments made by this section. (2) Failure to promulgate Beginning on the deadline in paragraph (1)(B) for finalizing regulations pursuant to such paragraph, until the Administrator finalizes such regulations, the Administrator is deemed— (A) to have determined under section 220(c)(2) of the Clean Air Act, as added by subsection (a) of this section, that each manufacturer of a motor vehicle subject to such section 220(c)(2) shall incorporate a restrictor assembly into the vehicle’s fuel filler tube so as to accept only a filling nozzle described in subparagraph (B); and (B) to have determined under section 220(d) of such Act that the diameter of each filling nozzle used by a gasoline retailer for dispensing gasoline with a research octane number of 95 or higher into a motor vehicle subject to such section 220(c) shall not exceed 0.77 inches. 102. Octane disclosure (a) High efficiency fuels Title II of the Petroleum Marketing Practices Act ( 15 U.S.C. 2821 et seq.) is amended by adding at the end the following: 206. High efficiency fuel and vehicle marketing requirements (a) Rule The Federal Trade Commission shall, by rule, and in consultation with persons to be regulated under this section, consumer advocates, and other stakeholders, as appropriate— (1) prescribe or revise requirements under this title relating to the certification, display, and representation of the automotive fuel rating of an automotive fuel as necessary to carry out— (A) the requirement under subsection (b); and (B) any determination made under subsection (c); (2) make the determination required under subsection (c)