CFR›Title 10›Chapter I›Part 21›Subject Group General Provisions ContainsSections 21.1–21.8CorpusDaily eCFRDisplayed edition2026-04-15Last updated2026-04-15 Sections 21.1 § 21.1 Purpose. 21.2 § 21.2 Scope. 21.3 § 21.3 Definitions. 21.4 § 21.4 Interpretations. 21.5 § 21.5 Communications. 21.6 § 21.6 Posting requirements. 21.7 § 21.7 Exemptions. 21.8 § 21.8 Information collection requirements: OMB approval. Previous Enforcement Enforcement Next Inspections, Records Inspections, Records