CFR›Title 17›Chapter I›Part 38›Subpart K ContainsSections 38.550–38.553CorpusDaily eCFRDisplayed edition2026-05-21Last updated2026-05-21 Subpart K—Trade Information Sections 38.550 § 38.550 Core Principle 10. 38.551 § 38.551 Audit trail required. 38.552 § 38.552 Elements of an acceptable audit trail program. 38.553 § 38.553 Enforcement of audit trail requirements. Source77 FR 36700, June 19, 2012, unless otherwise noted. Previous J Subpart J—Execution of Transactions Next M Subpart M—Protection of Markets and Market Participants