CFR›Title 49›Subtitle B›Chapter I›Part 172›Subpart B ContainsSections 172.101–172.102CorpusDaily eCFRDisplayed edition2026-08-10Last updated2026-08-10 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 H Subpart H—Training