If a classified document's Declassify On line contains a date, what additional information is required?

When a classified document's Declassify On line includes a date, no further information is required because the specified date serves as the point in time when the information will automatically be declassified. This marking indicates that the information has a predetermined release date, ensuring that the document can be safely declassified without the need for additional approval or context at that specific time.

It is important to understand that while other elements, such as the classification level or authority details, are critical for various aspects of document handling and management, the presence of a Declassify On date clearly stipulates when the document will transition from being classified to unclassified, making it the sole necessary information in this specific scenario.