CFR›Title 21›Chapter I›Part 50 ContainsSubparts A–DCorpusDaily eCFRDisplayed edition2026-04-27Last updated2026-04-27 PART 50—PROTECTION OF HUMAN SUBJECTS Subparts A Subpart A—General Provisions Sections 50.1–50.3 B Subpart B—Informed Consent of Human Subjects Sections 50.20–50.27 C Subpart C [Reserved] D Subpart D—Additional Safeguards for Children in Clinical Investigations Sections 50.50–50.56 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. Previous 25 Part 25—Environmental Impact Considerations Next 54 Part 54—Financial Disclosure by Clinical Investigators