40 CFR § 60.5005
Am I affected by this subpart?
June 9, 2020
(a) If you are the Administrator of an air quality program in a state or United States protectorate with one or more SSI units that commenced construction on or before October 14, 2010, you must submit a state plan to U.S. Environmental Protection Agency (EPA) that implements the emission guidelines contained in this subpart.
(b) You must submit the state plan to EPA by March 21, 2012.