Which of the following would be considered a correct set of marks for a Category B package?

• A. UN 3373 Diamond-on-point marking only
• B. Name and telephone number of a person responsible only
• C. Shipper information only
• D. UN 3373 Diamond-on-point marking, Name and telephone number of a person responsible, Shipper information

Answer: (D)

For a Category B package, you must clearly communicate the hazard, provide a contact in case of issues, and identify the sender. The outer packaging should display the UN 3373 Diamond-on-point marking so handlers know it contains an infectious substance, Category B. In addition, there must be the name and a telephone number of a person responsible who can be reached in an incident. Shipper information should also be present on the outside to identify who sent the package. Together, these elements ensure proper hazard recognition, emergency contact capability, and traceability of the shipment. If any part is missing, the package would not meet complete marking requirements.