Which of the following is a requirement under the DoD guideline for derivative classification?

Marking new documents consistent with source information is a fundamental requirement under the Department of Defense (DoD) guidelines for derivative classification. When derivative classification is applied, it involves creating new documents that contain classified information derived from previously classified sources. The accuracy in marking these new documents is critical because it helps maintain the integrity and traceability of classified information across various documents and ensures that the classification levels, categories, and handling instructions align with those of the original sources.

This practice safeguards against the inadvertent release of classified information and ensures that personnel understand the context of the classifications. Proper marking also helps facilitate proper classification management and retrieval by allowing authorized individuals to recognize the sensitivity of the information and adhere to appropriate procedures for handling it. Adherence to this requirement helps uphold the overall security posture of the organization and protect national security interests.

As for the other options, while they speak to important aspects of information security, they do not specifically address the requirements laid out in the DoD guidelines for derivative classification. Routine reviews and ensuring information is not left unattended are related to security practices but are not unique to derivative classification processes. Similarly, notifying personnel of classified information transfer is essential but does not focus directly on the requirement of marking new documents consistently with source information.