CFR›Title 40›Chapter I›Part 97›Subpart AAA ContainsSections 97.201–97.208CorpusDaily eCFRDisplayed edition2026-04-15Last updated2026-04-15 Subpart AAA—CAIR SO2 Trading Program General Provisions Sections 97.201 § 97.201 Purpose. 97.202 § 97.202 Definitions. 97.203 § 97.203 Measurements, abbreviations, and acronyms. 97.204 § 97.204 Applicability. 97.205 § 97.205 Retired unit exemption. 97.206 § 97.206 Standard requirements. 97.207 § 97.207 Computation of time. 97.208 § 97.208 Appeal procedures. Previous AA Subpart AA—CAIR NO<sub>X</sub> Annual Trading Program General Provisions Next AAAA Subpart AAAA—CAIR NO<sub>X</sub> Ozone Season Trading Program General Provisions