Transportation of Hazardous Materials; Unloading of Intermodal (IM) and UN Portable Tanks on Transport Vehicles

Summary: This final rule amends the Hazardous Materials Regulations to permit, for an interim period and subject to certain unloading conditions, the unloading of IM and UN portable tanks transporting certain liquid hazardous materials when those tanks are not equipped with a thermal means of remote activation of the internal self-closing stop-valves fitted on the bottom discharge outlets. Permitting such unloading for an interim period affords operators time to bring the portable tanks into conformance with the regulations.