CFR›Title 21›Chapter I›21 CFR Part 50 Citation21 CFR Part 50ContainsSubparts Subpart A–Subpart DCorpusDaily eCFRDisplayed edition2026-10-09Last updated2026-10-09 PART 50—PROTECTION OF HUMAN SUBJECTS Subparts Subpart A Subpart A—General Provisions Subpart B Subpart B—Informed Consent of Human Subjects Subpart C Subpart C [Reserved] Subpart D Subpart D—Additional Safeguards for Children in Clinical Investigations Authority21 U.S.C. 321, 343, 346, 346a, 348, 350a, 350b, 352, 353, 355, 360, 360c-360f, 360h-360j, 371, 379e, 381; 42 U.S.C. 216, 241, 262.Source45 FR 36390, May 30, 1980, unless otherwise noted.