Which item must accompany the package to ensure proper closing?

• A. Must have a copy of instructions for proper closing of package
• B. Shipper must have a copy of all approval certificates
• C. Packaging does not contain radionuclides
• D. All closure valves must be closed and secured

Answer: (A)

The essential idea is that proper closure depends on having explicit, actionable steps for sealing the package. The instructions for proper closing tell exactly how to seal, what fasteners or seals to use, the sequence to follow, and any checks to confirm the closure is secure. When these instructions accompany the package, the person responsible for closing has a clear reference to perform the closure correctly, ensuring the integrity of the contents and compliance with packing rules. Other items may be important in different contexts (certifications, content classifications, or valve procedures), but they do not specifically guarantee that the package is closed correctly.