CFR›Title 18›Chapter I›18 CFR Part 1 Citation18 CFR Part 1ContainsSubpart Subpart ACorpusDaily eCFRDisplayed edition2026-10-16Last updated2026-10-16 PART 1—RULES OF GENERAL APPLICABILITY Subparts Subpart A Subpart A—Definitions and Rules of Construction AuthorityDept. of Energy Organization Act, 42 U.S.C. 7101-7352; E.O. 12009, 3 CFR 142 (1978); Administrative Procedure Act, 5 U.S.C. Ch. 5.