When declassifying a document, should a "(U)" replace the original portion markings?

When a document is declassified, the original classification markings should not be replaced by a "(U)" to denote unclassified status. Maintaining the original markings is important as it preserves the integrity of the document's history and clearly indicates the context of the information when it was classified. The original markings provide necessary details about the document's classification levels prior to declassification and can serve as a reference for how the information has evolved over time.

Removing original markings might create confusion or misinterpretation regarding the document’s history, especially if it is important for understanding the context in which the information was originally produced. Retaining the original markings alongside the notation of declassification ensures clarity, transparency, and adherence to proper information management protocols.