CFR›Title 18›Chapter I›Part 1 ContainsSubpart ACorpusDaily eCFRDisplayed edition2026-04-24Last updated2026-04-24 PART 1—RULES OF GENERAL APPLICABILITY Subparts A Subpart A—Definitions and Rules of Construction Sections 1.101–1.102 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. Next 1b Part 1b—Rules Relating to Investigations