CFR›Title 40›Chapter I›Part 97›Subpart AA ContainsSections 97.101–97.108CorpusDaily eCFRDisplayed edition2026-05-27Last updated2026-05-27 Subpart AA—CAIR NOX Annual Trading Program General Provisions Sections 97.101 § 97.101 Purpose. 97.102 § 97.102 Definitions. 97.103 § 97.103 Measurements, abbreviations, and acronyms. 97.104 § 97.104 Applicability. 97.105 § 97.105 Retired unit exemption. 97.106 § 97.106 Standard requirements. 97.107 § 97.107 Computation of time. 97.108 § 97.108 Appeal procedures. Previous A Subpart A—NO<sub>X</sub> Budget Trading Program General Provisions Next AAA Subpart AAA—CAIR SO<sub>2</sub> Trading Program General Provisions