What must a properly filled outer envelope include?

• A. Personal notes
• B. Tracking number only
• C. Classification and AL code
• D. Return address

Answer: (C)

A properly filled outer envelope should include the classification and AL (Access Level) code. This is important because the classification indicates the level of sensitivity of the information contained within the envelope. It helps ensure that the handling, transmission, and storage of the contents are in line with the appropriate security protocols. The AL code is also critical as it specifies the access level required to view the contents, ensuring that only authorized personnel can access sensitive information.

Including classification and AL codes aids in communications security by helping to prevent unauthorized access and ensuring that the envelope is handled according to the established security protocols. This kind of meticulous labeling is essential for maintaining the integrity and confidentiality of sensitive information in various environments, particularly in government and military contexts.

While other options such as personal notes, tracking numbers only, and return addresses may have their utility in different contexts, they do not provide the specific security measures that classification and AL codes offer in COMSEC processes.