CFR›Title 30›Chapter I›Part 57›Subpart A ContainsSections 57.1–57.2; Subject group ProceduresCorpusDaily eCFRDisplayed edition2026-04-24Last updated2026-04-24 Subpart A—General Contents 57.1 § 57.1 Purpose and scope. 57.2 § 57.2 Definitions. Procedures Procedures Section 57.1000 Next B Subpart B—Ground Control