What classification principle is identified by the term "revealed by" in the context of derivative classification?

• A. Document origin
• B. Source material justification
• C. Classification authority
• D. Conceptual understanding

Answer: (B)

In the context of derivative classification, the term "revealed by" refers specifically to the principle of source material justification. This principle indicates that when a person derives a new classification decision from existing information, they must rely on the original source material that supports the classification of the new document or data.

When classified information is exposed or disclosed in any form, the classification of the new material must be justified based on the classification guidance of the original source. This ensures that the derivative classifier appropriately assesses whether the new information retains its classified status based on the existing controls established in the source material. Thus, recognizing classification through the lens of what is revealed by source material is crucial for maintaining the integrity and security of classified data.