What concept is used when a new document states, "On 29 September, Operation Panda will commence," based on the properly marked source document?

• A. Interpretation
• B. Revealed By
• C. New Creation
• D. Reclassification

Answer: (B)

The concept being addressed in the situation where a new document references a specific date and operation based on the content of a properly marked source document is "Revealed By." This concept relates to the derivative classification process, where information that has been derived from a source document is used to create a new document that retains the security classification of the original source.

In this case, the new document is stating information that is already classified and based on existing, correctly marked source material. By doing so, it reaffirms the classification level of that information and acknowledges that it is derived from another source. Consequently, this maintains the integrity of the classified information while allowing for its re-use in a new context.

The other concepts, such as interpretation, new creation, and reclassification, do not accurately describe the process occurring here. Interpretation would imply a subjective assessment of the information, while new creation suggests a completely new classification level, and reclassification involves changing the classification status of existing information rather than deriving new documents from it.