CFR›Title 40›Chapter I›Part 265›Subpart A ContainsSections 265.1–265.4CorpusDaily eCFRDisplayed edition2026-05-07Last updated2026-05-07 Subpart A—General Sections 265.1 § 265.1 Purpose, scope, and applicability. 265.2-265.3 §§ 265.2-265.3 [Reserved] 265.4 § 265.4 Imminent hazard action. Next AA Subpart AA—Air Emission Standards for Process Vents