Which of the following actions is considered a violation of the third agency rule?

The third agency rule is a principle that pertains to the handling and dissemination of classified information. It stipulates that classified information should not be shared with third parties or agencies without explicit permission from the original source or the authority governing that information.

Disseminating classified information without consent violates this rule because it undermines the trust and security protocols established to protect sensitive data. It could lead to unauthorized access to information that could jeopardize national security or compromise operational effectiveness. Thus, sharing such information without the necessary clearance is the direct violation of the third agency rule.

In contrast, the other actions listed—properly handling classified materials, training personnel in security procedures, and documenting classified information—are all actions that conform to established security protocols. These practices are essential for maintaining the integrity and security of classified information and ensure that personnel are prepared to handle such material appropriately.