Which statement about Radioactive material with a subsidiary risk is correct?

• A. Labeled with subsidiary risk labels; allocated to Packing Groups I, II, or III; meet appropriate packaging performance criteria for the subsidiary risk
• B. Labeled with risk labels but no packaging criteria
• C. Not labeled and not allocated to any packing group
• D. Only allocated to Packing Group I

Answer: (A)

When a radioactive material has a subsidiary risk, you must clearly communicate both hazards and ensure packaging safety for the secondary risk. This means the shipment carries the subsidiary risk label in addition to the primary hazard labels, and the packaging must meet the performance criteria not only for the main hazard but also for the subsidiary risk. The packing group (I, II, or III) is chosen based on the packaging’s required robustness to contain both hazards during transport. In short, labeling reflects the extra hazard, the packaging must comply with criteria for that subsidiary risk, and the material is assigned an appropriate packing group. The other options miss one or more of these requirements—either skipping the subsidiary risk labeling, skipping the necessary packaging criteria, or limiting the packing group to only one possibility.