CFR›Title 27›Chapter I›Part 18›27 CFR Part 18 Subpart A Citation27 CFR Part 18 Subpart AContainsSections § 18.1–§ 18.3CorpusDaily eCFRDisplayed edition2026-09-24Last updated2026-09-24 Subpart A—Scope Sections § 18.1 § 18.1 Scope. § 18.2 § 18.2 Applicability of law. § 18.3 § 18.3 Unlawful operations. Authority26 U.S.C. 5001, 5171-5173, 5178, 5179, 5203, 5351, 5354, 5356, 5511, 5552, 6065, 6109, 7805.SourceT.D. ATF-104, 47 FR 23921, June 2, 1982, unless otherwise noted.