CFR›Title 27›Chapter I›Part 18›27 CFR Part 18 Subpart B Citation27 CFR Part 18 Subpart BContainsSection § 18.11CorpusDaily eCFRDisplayed edition2026-10-15Last updated2026-10-15 Subpart B—Definitions Sections § 18.11 § 18.11 Meaning of terms. 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.