CFR›Title 1›Chapter I›Part 21›Subpart B›Subject Group Form ContainsSections 21.51–21.53CorpusDaily eCFRDisplayed edition2026-04-15Last updated2026-04-15 Sections 21.51 § 21.51 General. 21.52 § 21.52 Statutory material. 21.53 § 21.53 Nonstatutory materials. Previous 21.42 § 21.42 Exceptions. Next Placement Placement