PHMSA-RSPA-2004-18730 (HM-232E): Hazardous Materials: Enhancing Rail Transportation Safety and Security for Hazardous Materials Shipments; Interim Final Rule; Effective Date 6/1/2008
FMCSA-02-11650 (HM-232A); Hazardous Materials: Security Requirements for Motor Carriers Transporting Hazardous Materials (TSA assumes lead role for Motor Carrier Security)