Permanent marking and labeling and container seals must be applied to containers of _________.

Permanent marking and labeling and container seals must be applied to containers of _________.

• A. Unmarked containers
• B. Material for which the explosives safety status has been documented as MDAS or MDEH
• C. Any material
• D. Only MDAS, not MDEH

Answer: (B)

Permanent marking, labeling, and container seals are required only for containers holding material whose explosives safety status has been formally documented as MDAS or MDEH. This labeling communicates the exact hazard status so that personnel know which safety controls to apply during handling, storage, and transport, and it helps responders identify how to respond in an emergency. MDAS (Material Determined as Safe) indicates the material has been evaluated and found to be safe under the explosives safety criteria, while MDEH (Material Determined as Explosive Hazard) indicates an explosive hazard that requires specific handling and restrictions. The markings ensure clear, ongoing communication of status, even if packaging is moved or opened. Unmarked containers or materials without a documented status do not carry the necessary hazard information, and materials that have not been evaluated do not require these specific markings.

Permanent marking, labeling, and container seals are required only for containers holding material whose explosives safety status has been formally documented as MDAS or MDEH. This labeling communicates the exact hazard status so that personnel know which safety controls to apply during handling, storage, and transport, and it helps responders identify how to respond in an emergency. MDAS (Material Determined as Safe) indicates the material has been evaluated and found to be safe under the explosives safety criteria, while MDEH (Material Determined as Explosive Hazard) indicates an explosive hazard that requires specific handling and restrictions. The markings ensure clear, ongoing communication of status, even if packaging is moved or opened. Unmarked containers or materials without a documented status do not carry the necessary hazard information, and materials that have not been evaluated do not require these specific markings.