When creating derivative classifications, which of the following is NOT a valid source?

• A. Classified summaries
• B. Unclassified public records
• C. Previously classified documents
• D. Security Classification Guides

Answer: (B)

The choice of unclassified public records as not being a valid source for derivative classification is correct because derivative classification relies on existing classified information or guidance to produce a new classified product. Public records, by their nature, are not classified and do not contain the sensitive information or handling requirements necessary to create a derivative classification.

On the other hand, classified summaries, previously classified documents, and security classification guides are all valid sources because they contain or cite information that is already classified. Using these sources, individuals can create new documents that maintain the protection of classified information while ensuring compliance with proper classification protocols. This process helps in upholding national security standards.