The U.S. Environmental Protection Agency (EPA) has published a notice of proposed rulemaking to match U.S. standards for greenhouse gas emission standards for certain new commercial airplanes with the International Civil Aviation Organization (ICAO) standards adopted in 2017 for airplane carbon dioxide (CO²) emissions.
If adopted, the proposed standards would only apply to new type design airplanes on or after Jan. 1, 2020, and to “in-production” airplanes on or after Jan. 1, 2028, but not already manufactured airplanes currently in use. Certain subsonic jet airplanes with a maximum takeoff mass (MTOM) greater than 12,566 pounds, and larger subsonic turboprop airplanes having an MTOM greater than 18,999 pounds would need to meet the new EPA standards.