Final answer:
The information that must be clearly marked on packages of non-bulk radioactive material includes material composition and weight, radioactive symbol and activity, and emergency contact and handling instructions.
Step-by-step explanation:
The information that must be clearly marked in English on all packages of non-bulk radioactive material to be shipped off-site, based on marking, labeling, and placarding regulations, includes:
- Material composition and weight: This information is important for understanding the nature and characteristics of the radioactive material.
- Radioactive symbol and activity: The radioactive symbol helps to identify the presence of radioactive materials, while the activity indicates the intensity or strength of the radiation.
- Emergency contact and handling instructions: These details provide important information on how to handle the package in case of emergencies or accidents.