CFR›Title 40›Chapter I›Part 51›Subpart A ContainsSubject groups General Information for Inventory Preparers–Specific Reporting RequirementsCorpusDaily eCFRDisplayed edition2026-05-18Last updated2026-05-18 Subpart A—Air Emissions Reporting Requirements Subject Groups General Information for Inventory Preparers General Information for Inventory Preparers Sections 51.1–51.10 Specific Reporting Requirements Specific Reporting Requirements Sections 51.15–51.50; Appendix A Source73 FR 76552, Dec. 17, 2008, unless otherwise noted. Next AA Subpart AA—Provisions for Implementation of the 2008 Ozone National Ambient Air Quality Standards