on October 15, 2012, in the final rule entitled 2017 and Later Model Year Light-Duty Vehicle Greenhouse Gas Emissions and Corporate Average Fuel Economy Standards (77 Fed. Reg. 62623), including such standards for model years 2022 through 2025 that were found by the Environmental Protection Agency to remain appropriate in the Final Determination on the Appropriateness of the Model Year 2022–2025 Light-Duty Vehicle Greenhouse Gas Emissions Standards under the Midterm Evaluation issued in January 2017. (b) Restriction on Revising Standards or Creating New Loopholes The Administrator of the Environmental Protection Agency may not take any action that could effectively reduce the stringency of greenhouse gas emission standards required to be attained by each fleet of light-duty vehicles manufactured for sale in the United States for model years up to and including 2025, including by revising the trading, transferring, availability, or creation of credits.