IATA Packing and Shipping Dangerous Goods Practice Test

In the United States, the Department of Transportation is the federal authority that governs the transport of dangerous goods. It enforces the Hazardous Materials Regulations (HMR), which cover how dangerous goods must be classified, packaged, labeled, marked, documented, and trained for transport across all modes, with PHMSA taking the lead and the FAA applying these rules to air transport.

The United States Postal Service handles mail shipments under its own hazmat rules, not the overarching governance of dangerous goods transport. The International Civil Aviation Organization sets international standards, but it is not a U.S. agency. The Environmental Protection Agency focuses on environmental protection, not the regulatory framework for transporting dangerous goods.