by National Archives and Records Administration, ISOO Implementing Directive Pursuant to Executive Order 13526…
“ Information approved by the Panel as exempt from automatic declassification at 75 years shall be marked ``75X ́ ́ with the appropriate automatic declassification exemption category number followed by the approved declassification date or event. (2) Requests for exemption from automatic declassification at 75 years from elements of the Intelligence Community (to include pertinent elements of the Department of Defense) should include a statement of support from the Director of National Intelligence or his or her designee. ”
