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classified marking guide (dec 2010) - the Security Training Portal.

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Declassification Instructions on Derivatively Classified Documents:When a source document contains <strong>the</strong> <strong>dec</strong>lassification instruction “DNI Only” or “DCI Only,” <strong>the</strong>derivative document will be marked as “Declassify On: 25X1, E.O. 12951.”Source DocumentSECRETFebruary 15, 2004Department of Good WorksWashington, D.C. 20006MEMORANDUM FOR THE DIRECTORFrom: John E. Doe, Chief Division 5Subject: (U) Examples1. (U) Paragraph 1 contains “Un<strong>classified</strong>” information.Therefore, this portion will be marked with <strong>the</strong>designation “U” in paren<strong>the</strong>ses preceding <strong>the</strong> portion.2. (S) Paragraph 2 contains “Secret” information.Therefore, this portion will be marked with <strong>the</strong>designation “S” in paren<strong>the</strong>ses preceding <strong>the</strong> portion.Classified By: John E. Doe, Chief Division 5Reason: 1.4(a)Declassify On: DNI OnlySECRETDerivative DocumentChange “DNI Only” or “DCI Only” to“25X1, E.O. 12951.”Classified By: Joan Smith, Program AnalystDerived From: Department of Good Works Memorandumdated Feb 15, 2004, Subj: (U) ExamplesDeclassify on: 25X1, E.O. 12951SECRETNOTE: E.O. 12951, Release of Imagery Acquired by Space-Based National IntelligenceReconnaissance Systems, gives <strong>the</strong> Director of National Intelligence (DNI) <strong>the</strong> authority to<strong>dec</strong>lassify intelligence imagery.- 23 -

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