Fuel economy of dual fueled automobiles

(a) Measurement of fuel economy for electric dual fueled automobiles Section 32905(e) of title 49, United States Code, is amended— (1) in paragraph (1), in the matter preceding subparagraph (A)— (A) by striking At the request of the manufacturer, the Administrator may and inserting The Administrator shall; and (B) by striking model year 2015 and inserting model year 2026; and (2) by amending paragraph (2) to read as follows: (2) Review and updating of formula Not later than 3 years after the date of the enactment of this paragraph, and every 3 years thereafter, the Administrator shall, using real-world data if possible, review and update the formula for determining under paragraph (1) percentage utilization on gasoline or diesel fuel and percentage utilization on electricity.. (b) Fuel economy information for dual fueled automobiles (1) Labeling requirements and contents Section 32908(b)(3) of title 49, United States Code, is amended— (A) by redesignating subparagraphs (B), (C), and (D) as subparagraphs (D), (E), and (F), respectively; and (B) by inserting after subparagraph (A) the following: (B) indicate the fuel economy of the automobile when operated primarily on alternative fuel; (C) indicate the multi-day average fuel economy of the automobile when operated on a combination of alternative fuel and gasoline or diesel fuel, with the percentage utilization of alternative fuel and the percentage utilization of gasoline or diesel fuel being determined by a formula based on real-world data and updated not less frequently than every 3 years;. (2) Fuel economy information booklet Section 32908(c)(2)(B) of title 49, United States Code, is amended— (A) in clause (i), by striking; and and inserting a semicolon; (B) by redesignating clause (ii) as clause (iii); and (C) by inserting after clause (i) the following: (ii) information on the multi-day average fuel economy of the automobile when operated on a combination of alternative fuel and gasoline or diesel fuel, as indicated under subsection (b)(3)(C); and. (c) Applicability The amendments made by this section shall apply with respect to automobiles of model year 2027 or later.