Information Security Oversight Office (ISOO)


The Information Security Oversight Office issues ISOO Notices to disseminate and provide consistent guidance to Federal Agencies, in an effort to improve their classified national security information programs. Each ISOO Notice focuses on a single topic related to classification, safeguarding, or declassification.

Due to the issuance of Executive Order 13526 and the revision to 32 C.F.R part 2001, many of the original notices have been revised, canceled, or superseded. The notices listed reflect these changes.

*Please note the table headers are clickable, sort the table by the clicked column header.

Number Date
Title Status Date of Change
2014-03 08/27/2014 U.S. Protection of Information Shared by the Government of the United Kingdom    
2014-02 04/04/2014 Procurement of Security Equipment    
2014-01 03/26/2014 Appeal Rights for Mandatory Declassification Review Requests and the Rejection of Requests for Specific Reasons    
2013-06 09/18/2013 Changes in Express Mail    
2013-05 08/19/2013 Revision of the Standard Form (SF) 312, “Classified Information Nondisclosure Agreement”    


06/14/2013 The National Security Staff (NSS) Partial Waiver for the Declassification Review of Select National Security Council and White House Classified Records    
2013-03 04/10/2013 Processing of Mandatory Declassification Review Requests Appealed to the Interagency Security Classification Appeals Panel    
2013-02 01/23/2013 Agencies Eligible to Receive Referrals from Automatic Declassification at 25, 50, and 75 Years    
2013-01 11/01/2012 Further Marking Guidance on Commingling North Atlantic Treaty Organization (NATO) and Classified National Security Information (NSI)    
2012-04 10/12/2012 Additional Guidance on Standards for Security Equipment    
2012-03 04/02/2012 Additional Guidance on Supplemental Controls Required for Safeguarding Classified National Security Information    
2012-02 12/23/2011 Classification Marking Instructions on the Use of "50X1-HUM" vs "25X1-human" as a Declassification Instruction
2012-01 12/08/2011 Requirements for Derivative Classifier Training    
2011-02 05/18/2011 Further Guidance and Clarification on Commingling Atomic Energy Information and Classified National Security Information
2009-16 09/17/2009 Prohibited Use of Electronic Signatures on the Standard Form 312, "Classified Information Non-disclosure Agreement"

Reviewed 04/26/2010
2009-15 07/16/2009 Further Definition of “Comparable Media” as it Relates to Delays in the Onset of Automatic Declassification Cancelled 09/30/2010
2009-14 06/09/2009 Corrections to Citations in 32 C.F.R. Part 2001 Referencing Open Storage Areas Cancelled 09/30/2010
2009-13 05/08/2009 Prohibited Use of X1-X8 Markings Cancelled 09/30/2010
2009-12 05/08/2009 Prohibited Use of the Marking “OADR” Cancelled 09/30/2010
2009-11 05/08/2009 Prohibited Use of the Markings “MR” (Manual Review) and “Source Marked MR, date of source [date]” Cancelled 09/30/2010
2009-10 04/28/2009 Security Violation Reporting to ISOO Cancelled 09/30/2010
2009-09 01/09/2009 Derivative Classification – Identification of Multiple Sources Cancelled 09/30/2010
2009-08 01/09/2009 Utilization of Classified Addenda Cancelled 09/30/2010
2009-07 01/08/2009 Mandatory Declassification Review – Inappropriate Citation of Section 6.2(d) of E.O. 13526

2009-06 12/12/2008 Handling NATO Information Identified during Automatic Declassification Processing

Reviewed 04/26/2010
2009-05 10/10/2008 Agencies Ineligible to Receive Referrals Identified by Primary Reviewing Agencies Amongst Records Subject to Automatic Declassification on December 31st of 2006, 2007, and 2008 Superseded 09/30/2010
2009-04 10/10/2008 “Best Practices” for Declassification Review Record Keeping

Reviewed 04/26/2010


10/10/2008 Notification, Coordination, and Documentation Related to Subsequent Reviews Conducted by Primary Reviewing Agencies 
[Related to Automatic Declassification] 
Reviewed 04/26/2010
2009-02 10/10/2008  Initial Instructions on the Use of the SF 715, "Declassification Review Tab" Revised 09/30/2010
2009-01 10/10/2008 Use of Standard Form 715, "Declassification Review Tab" Revised 09/30/2010


Updated August 27, 2014

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