9 CFR §312.5
Verified against eCFR.gov as of June 20, 2026View official text on eCFR.gov ↗
The official mark for use in sealing railroad cars or other means of conveyance as prescribed in part 325 of this subchapter shall be the inscription and a serial number as hereinafter shown 2 and any seal approved by the Administrator for applying such mark shall be an official device for purposes of the Act. This seal shall be attached to the means of conveyance only by a Program employee and he shall also affix thereto a “Warning Tag” (Form MP-408-3).