; and (ii) 0.21 divided by the fuel economy measured under subsection (a) when operating the model on alternative fuel, which is deemed to contain 0.15 gallon of fuel. (2) Greenhouse gas emissions For any model of dual-fueled automobile manufactured by a manufacturer in model year 2023 or later, the Administrator of the Environmental Protection Agency shall measure the greenhouse gas emissions for that model, which shall be the sum obtained by adding— (A) the product obtained by multiplying— (i) the measured greenhouse gas emissions on the alternative fuel; (ii) the fuel content of the alternative fuel, which is deemed to be 0.15; and (iii) 0.21; and (B) the product obtained by multiplying 0.79 and the measured greenhouse gas emissions on gasoline or diesel fuel, as applicable. (3) Higher utilization factor for new models A manufacturer may demonstrate that a higher utilization factor applies to any model of dual-fueled automobile manufactured by the manufacturer in model year 2025 or later. . (b) Testing procedures Section 206 of the Clean Air Act ( 42 U.S.C. 7525 ) is amended by adding at the end the following: (i) Requirement To update test procedures Not later than July 1, 2024, the Administrator shall amend the test procedures promulgated under this section to be in accordance with section 32905(b)(1)(B) of title 49, United States Code. . 11. Transfers of credits for exceeding average fuel economy standards Section 32903(g) of title 49, United States Code, is amended by striking paragraph (3) and inserting the following: (3) Maximum increase The maximum increase in any compliance category attributable to transferred credits is— (A) for model year 2023, 4.0 miles per gallon; and (B) for model year 2024 and subsequent model years, 6.0 miles per gallon. .