; and (2) not later than January 1, 2021, shall promulgate the regulations required by such paragraph (2)(A)(i) respecting the requirements under such section 211(o) applicable for calendar year 2023 and subsequent calendar years. (c) Waiver authority The amendments made by section 202 of this Act to section 211(o)(7) of the Clean Air Act ( 42 U.S.C. 7545(o)(7) ) shall take effect on January 1, 2023. (d) Definition The amendment made by section 201(d) of this Act to subparagraph (J) of section 211(o)(1) of the Clean Air Act ( 42 U.S.C. 7545(o)(1) ), as redesignated by section 201(c)(2) of this Act, shall take effect on the date of enactment of this Act. (e) Repeals Effective January 1, 2033, subsections (o), (q), and (v) of section 211 of the Clean Air Act ( 42 U.S.C. 7545 ) are repealed. 204. State ethanol laws (a) In general No State or political subdivision of a State may prohibit or require any particular blend, concentration, or percentage of ethanol in any automotive fuel. (b) Exception This section does not restrict the authority of a State or political subdivision of a State to continue to enforce any such prohibition or requirement in effect prior to the date of enactment of this Act. B Ethanol waivers 211. Reid vapor pressure (a) Reid vapor pressure limitation Section 211(h) of the Clean Air Act ( 42 U.S.C. 7545(h) ) is amended— (1) in paragraph (4)— (A) in the matter preceding subparagraph (A), by inserting or more after 10 percent ; and (B) in subparagraph (C), by striking additional alcohol or ; and (2) in paragraph (5)(A), by inserting or more after 10 percent . (b) Existing waivers Section 211(f)(4) of the Clean Air Act ( 42 U.S.C. 7545(f)(4) ) is amended— (1) by striking The Administrator, upon and inserting (A) The Administrator, upon