CFR›Title 18›Chapter I›Part 366 ContainsSubparts A–BCorpusDaily eCFRDisplayed edition2026-04-24Last updated2026-04-24 PART 366—BOOKS AND RECORDS Subparts A Subpart A—Definitions and Provisions Under PUHCA 2005, the Federal Power Act and the Natural Gas Act Sections 366.1–366.7 B Subpart B—Accounting and Recordkeeping Under PUHCA 2005, the Federal Power Act and the Natural Gas Act Sections 366.21–366.23 Authority15 U.S.C. 717 et seq., 16 U.S.C. 791a et seq., and 42 U.S.C. 16451-16463.SourceOrder 667-A, 71 FR 28457, May 16, 2006, unless otherwise noted. Previous 358 Part 358—Standards of Conduct Next 367 Part 367—Uniform System of Accounts for Centralized Service Companies Subject to the Provisions of the Public Utility Holding Company Act of 2005, Federal Power Act and Natural Gas Act