; divided by (2) the volumetric energy density of such test fuel. 203. E30 Section 211(f)(4) of the Clean Air Act ( 42 U.S.C. 7545(f)(4) ), as amended by section 201(b) of this Act, is further amended by adding at the end the following: (C) Beginning January 1, 2022, a fuel with a concentration of ethanol that is more than 15 percent and not more than 30 percent, shall be deemed to have received a waiver in accordance with subparagraph (A). . 204. Replacement of motor vehicle emissions simulator (MOVES) model Section 211(q)(2) of the Clean Air Act ( 42 U.S.C. 7545 ) is amended— (1) by striking For purposes of this section and inserting the following: (A) Initial model For purposes of this section ; and (2) by adding at the end of the following: (B) New model Not later than 24 months after the date of enactment of the Next Generation Fuels Act of 2020 , the Administrator shall develop and finalize an emissions model based on appropriate test fuels and methods to replace the emissions model under subparagraph (A). (C) Definition For purposes of subparagraph (B), the term appropriate test fuels and methods means test fuels and methods that rely on commercially available fuel and accurately reflect the profile of higher ethanol blends. . III Infrastructure 301. High-efficiency vehicles (a) In general Part A of title II of the Clean Air Act ( 42 U.S.C. 7521 et seq.) is amended by adding at the end the following new section: 220. Octane specification (a) Applicability This section applies with respect to any motor vehicle (other than a motorcycle) that is introduced into commerce that— (1) is a light-duty vehicle or light-duty truck; (2) is a model year 2024 or later motor vehicle