CFR›Title 16›Chapter I›Part 309›Subpart A ContainsSections 309.1–309.4CorpusDaily eCFRDisplayed edition2026-04-15Last updated2026-04-15 Subpart A—General Sections 309.1 § 309.1 Definitions. 309.2 § 309.2 What this part does. 309.3 § 309.3 Stayed or invalid portions. 309.4 § 309.4 Preemption. Next Appendix A to Part 309 Appendix A to Part 309—Figures for Part 309