Which publication is NOT considered an authoritative source for dangerous goods packaging instructions?

The International Air Transport Association (IATA) Manual, while it provides important guidance concerning the transportation of dangerous goods by air, is not considered an authoritative publication like the other options. The ICAO Technical Instructions, U.N. Orange Book, and the International Maritime Dangerous Goods Code are recognized as foundational regulatory documents that define the requirements for packing, marking, labeling, and documenting dangerous goods for international transport.

The ICAO Technical Instructions are specifically focused on air transportation safety and are considered the global standard by which airlines and states regulate air transport of dangerous goods. The U.N. Orange Book consolidates the essential elements of the UN Recommendations on the transport of dangerous goods, including packing instructions. The International Maritime Dangerous Goods Code governs the safe transport of dangerous goods by sea and outlines specific requirements standardized for maritime environments.

In contrast, the IATA Manual is based on these rules and guidelines, providing additional guidance for airlines, but it is not an original regulatory document in itself. Thus, it does not hold the same authoritative weight as the others in the context of dangerous goods packaging instructions.