CFR›Title 49›Subtitle B›Chapter I›Part 172›Subpart B ContainsSections 172.101–172.102CorpusDaily eCFRDisplayed edition2026-04-27Last updated2026-04-27 Subpart B—Table of Hazardous Materials and Special Provisions Sections 172.101 § 172.101 Purpose and use of the hazardous materials table. 172.102 § 172.102 Special provisions. Previous Appendix D to Part 172 Appendix D to Part 172—Rail Risk Analysis Factors Next I Subpart I—Safety and Security Plans