International Maritime Organization (IMO) Dangerous Goods, Solid Cargoes, and Containers Sub-Committee (DSC Sub-Committee) which is responsible for maintaining the International Maritime Dangerous Goods Code (IMDG). The IMDG Code includes the requirements for the safe transport of hazardous materials by sea. Under the U.S. Hazardous Material Regulations (HMR) transport of hazardous materials by vessel in accordance with the IMDG Code is authorized by the HMR subject to certain conditions and limitations.