When deriving information from a single document, what is the 'Classified By' line used for?

The 'Classified By' line serves a vital purpose in marking classified documents as it identifies the original classification authority. This designation is crucial because it pinpoints who had the authority to classify the information in the document. Understanding the original classification authority helps in accountability and ensures proper handling and protection of the information, as it specifies who made the determination about its classification status.

This is important for those who may need to assess the document later for declassification or need to understand the context behind the classification decision. Knowing who initiated the classification can also inform future decisions regarding access and dissemination of the information contained within the document.