Subpart A - General Rules for All Hazardous Materials

Subpart A of Title 49 of the Code of Federal Regulations sets the overarching requirements that apply to all hazardous materials, regardless of the mode of transport. It defines hazardous material categories, outlines classification criteria, and establishes basic packaging, labeling, marking, and documentation standards that must be followed to ensure safe handling and compliance across air, highway, rail, and water shipments.