CFR › Title 49 › Part 215 › §215.40549 CFR §215.405Verified against eCFR.gov as of June 20, 2026View official text on eCFR.gov ↗Copy link(a)Cars prohibited. A railroad freight car manufacturer may not register, or cause to be registered, a railroad freight car that does not comply with the requirements under this subpart in the Umler system.(b)[Reserved]