CFR›Title 50›Chapter I›Part 18›Subpart A ContainsSections 18.1–18.3CorpusDaily eCFRDisplayed edition2026-06-08Last updated2026-06-08 Subpart A—Introduction Sections 18.1 § 18.1 Purpose of regulations. 18.2 § 18.2 Scope of regulations. 18.3 § 18.3 Definitions. Next B Subpart B—Prohibitions