CFR›Title 17›Chapter II›Part 203 ContainsSubparts A–BCorpusDaily eCFRDisplayed edition2026-04-23Last updated2026-04-23 PART 203—RULES RELATING TO INVESTIGATIONS Subparts A Subpart A—In General Sections 203.1–203.3 B Subpart B—Formal Investigative Proceedings Sections 203.4–203.8 Authority15 U.S.C. 77s, 77sss, 78w, 80a-37, and 80b-11, unless otherwise noted.Source29 FR 3620, Mar. 21, 1964, unless otherwise noted. Previous 202 Part 202—Informal and Other Procedures Next 204 Part 204—Rules Relating to Debt Collection