What type of information is NOT contained in the classification authority block for a document?

The classification authority block is an essential part of a classified document, as it outlines the necessary details regarding its classification status. It typically includes elements such as "Classified By," which identifies the person responsible for classifying the document, "Derived From," which indicates the source or reason for the classification, and "Declassify On," which provides the date or event when the document will be declassified.

The response indicating that "None of the above" means that all the specified types of information—Classified By, Derived From, and Declassify On—are indeed present in the classification authority block. This comprehensive inclusion ensures that anyone handling the document understands its classification status and the conditions under which it may be declassified.