What type of information must Type A packages be marked with?

Type A packages must be marked with specific information to ensure proper handling and safety during transportation of radioactive materials. This information includes the package specification, the proper shipping name, and the UN (United Nations) ID number.

The package specification indicates that the package is compliant with regulations for its design and construction, ensuring it can safely contain the radioactive material under different conditions during transport. The proper shipping name clearly identifies the contents of the package, which is essential for emergency responders and transport personnel to know what they are dealing with in case of an incident. The UN ID serves as a unique identifier for the particular radioactive substance contained within the package, providing further specificity and ensuring that the material is handled according to related safety regulations and protocols.

Marking packages accurately with this information is crucial for public safety and regulatory compliance in the transport of hazardous materials, particularly those involving radioactivity. This is why the correct answer emphasizes these key elements required for Type A package markings.