Which of the following is true regarding transfers of COMSEC manuals?

The requirement for authorization according to relevant transfer documentation is critical in the context of COMSEC (Communications Security) manuals. These manuals often contain sensitive information pertaining to secure communication methods, encryption practices, and operational procedures. Therefore, adhering to strict transfer protocols is necessary to prevent unauthorized access to information that could compromise security.

When transferring COMSEC manuals, the authorization process ensures that the recipient is properly vetted and has the necessary clearance to handle such sensitive materials. This authorization typically involves documented evidence to ensure accountability and traceability of the materials, helping maintain the integrity of the COMSEC program.

The other options do not align with the fundamental security practices surrounding COMSEC manuals. Transferring them without authorization or proper documentation poses a significant risk to national security, and the assertion that they can only be transferred internationally or without any documentation is not reflective of established COMSEC policies, which emphasize the need for careful management of sensitive information.