CFR›Title 49›Subtitle B›Chapter II›Part 221 ContainsSubpart A; Appendices A–B; Subpart BCorpusDaily eCFRDisplayed edition2026-04-27Last updated2026-04-27 PART 221—REAR END MARKING DEVICE—PASSENGER, COMMUTER AND FREIGHT TRAINS Contents A Subpart A—General Sections 221.1–221.11 Appendix A to Part 221 Appendix A to Part 221—Procedures for Approval of Rear End Marking Devices Appendix B to Part 221 Appendix B to Part 221—Approved Rear End Marking Devices B Subpart B—Marking Devices Sections 221.13–221.17 Authority49 U.S.C. 20103, 20107; 28 U.S.C. 2461 note; and 49 CFR 1.89.Source42 FR 2321, Jan. 11, 1977, unless otherwise noted. Previous 220 Part 220—Railroad Communications Next 222 Part 222—Use of Locomotive Horns at Public Highway-Rail Grade Crossings