Which of the following statements best describes derivative classification?

The statement that describes derivative classification accurately states that it uses existing classifications to classify new documents. In the context of national security and information management, derivative classification involves taking information that has already been classified and applying that classification to new materials that are based on or related to the original classified information.

This process is crucial because it ensures that sensitive information is correctly identified and protected in any new documents or materials created. The derivation of classifications ensures continuity in the protection of national security information and assists in maintaining an organized and efficient classification system.

The other options do not accurately reflect the process of derivative classification. Creating new classifications from scratch is not part of derivative classification; it is about applying established rules and classifications. Derivative classification is specifically concerned with classified information and does not include public documents. It is also directly relevant to national security, as proper handling and classification of sensitive information are critical to protecting national interests.