CFR›Title 50›Chapter I›Part 13›Subpart A ContainsSections 13.1–13.5CorpusDaily eCFRDisplayed edition2026-04-27Last updated2026-04-27 Subpart A—Introduction Sections 13.1 § 13.1 General. 13.2 § 13.2 Purpose of regulations. 13.3 § 13.3 Scope of regulations. 13.4 § 13.4 Emergency variation from requirements. 13.5 § 13.5 Information collection requirements. Next B Subpart B—Application for Permits