What is the shipper's first, and most important, responsibility?

• A. Classification
• B. Packing
• C. Marking and labeling
• D. Documentation

Answer: (A)

Determining the material’s hazard classification is the shipper’s first and most important responsibility because it identifies the exact hazard class, division, and packing group that apply to the shipment. That classification sets the rules for all downstream requirements: the proper packing instructions, the type of packaging that can be used, the quantity limits, the necessary marking and labeling, and the content of the shipping documents. If the classification is wrong, the entire handling and documentation scheme can be inappropriate or unsafe, leading to mispacked goods, incorrect labels, and misleading papers that fail to communicate the real risks. Once the classification is correct, the rest—packing, marking and labeling, and documentation—can be done correctly and consistently.