Which of the following is true about the marking on an overpack when inner packages are compliant?

• A. The marking 'Overpack' should be placed on the outside
• B. The marking is not required if inner packages are compliant
• C. The marking must be inside the overpack
• D. The marking is optional

Answer: (A)

Marking the exterior with the word Overpack communicates to all handlers that this unit is an overpack containing several inner packages. This visibility is required to ensure correct handling, stowage, and regulatory recognition, and it applies even when the inner packages already carry their own markings. The marking belongs on the outside so it can be seen without opening the overpack; placing it inside would defeat its purpose, and making the marking optional or omitting it would reduce visibility and compliance.