CFR›Title 49›Subtitle B›Chapter VI›Part 672 ContainsSubparts A–DCorpusDaily eCFRDisplayed edition2026-04-23Last updated2026-04-23 PART 672—PUBLIC TRANSPORTATION SAFETY CERTIFICATION TRAINING PROGRAM Subparts A Subpart A—General Provisions Sections 672.1–672.5 B Subpart B—Training Requirements Sections 672.11–672.17 C Subpart C—Administrative Requirements Sections 672.21–672.23 D Subpart D—Compliance and Certification Requirements Section 672.31 Authority49 U.S.C. 5329, 5334; 49 CFR 1.91.Source89 FR 66007, Aug. 14, 2024, unless otherwise noted. Previous 671 Part 671—Rail Transit Roadway Worker Protection Next 673 Part 673—Public Transportation Agency Safety Plans