CFR›Title 49›Subtitle B›Chapter II›49 CFR Part 221 Citation49 CFR Part 221ContainsAppendices A–B; Subparts Subpart A–Subpart BCorpusDaily eCFRDisplayed edition2026-09-08Last updated2026-09-08 PART 221—REAR END MARKING DEVICE—PASSENGER, COMMUTER AND FREIGHT TRAINS Contents 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 Subpart A Subpart A—General Subpart B Subpart B—Marking Devices 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.