CFR›Title 40›Chapter I›Part 355›Subpart B ContainsSubject groups How to Comply–Who Must ComplyCorpusDaily eCFRDisplayed edition2026-06-23Last updated2026-06-23 Subpart B—Emergency Planning Subject Groups How to Comply How to Comply Sections 355.20–355.21 Who Must Comply Who Must Comply Sections 355.10–355.16 Previous Appendix B to Part 355 Appendix B to Part 355—The List of Extremely Hazardous Substances and Their Threshold Planning Quantities Next C Subpart C—Emergency Release Notification