Information Security Oversight Office (ISOO)

ISOO Notices

As of 2026, to support a modernized government information management landscape that must consider both classified information and controlled unclassified information as having national security implications, guidance that in the past may have been issued as an ISOO Notice or CUI Notice will be issued in a single series of ISOO Notices. CUI Notices and Executive Agent Guidance issued prior to 2026 continue to remain in effect in their current format and will not be renamed. However, future guidance that may have in the past been issued as a CUI Notice will now be issued as an ISOO Notice. CUI Notices and Executive Agent Guidance issued prior to 2026 can be found by scrolling down on this page, or by clicking here

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

Number	Date	Title	Status	Date of Change
2026-02	06/10/2026	Prohibition on the Use of Combination Translator Applications to Generate Lock Combinations that Protect Classified Information
2026-01	3/30/2026	Responsible Use of Classified National Security Information and Controlled Unclassified Information with Artificial Intelligence
2025-01	9/08/2025	Incorporating Automatic Declassification Exemptions into Security Classification Guidance
2024-03	7/23/2024	Changes to ISOO Liaison Program
2024-02	02/29/2024	Agencies Eligible to Receive Referrals from Automatic Declassification at 25, 50, and 75 Years	Cancels Notice 2019-01	6/5/2024
2024-01	10/05/2023	Joint Ventures and Entity Eligibility Determinations
2023-02	06/23/2023	Handling NATO Information Identified during Automatic Declassification Processing	Cancels Notice 2009-06	6/23/23
2023-01	06/21/2023	Classified Records Found Outside Government Control
2022-03 Black Label Letter	08/18/2022 11/29/2023	General Services Administration (GSA) Approved Security Equipment Clarification Regarding GSA/IACSE Black Label Phase Out Plan	Amends Notice 2021-01 Rescinds approval in accordance with the phase-out plan listed in ISOO NOTICE 2021-01	1/09/2024
2022-02	5/23/2022	Declassification Guide Review Requirements
2022-01	05/10/2022	Digital Signatures on Standard Form (SF) 312, Classified Information Nondisclosure Agreement
2021-03	10/05/2021	Applying to the Technology Modernization Fund (TMF) to support classification and declassification improvements
2021-02	07/16/2021	Partial Waiver for the Declassification Review of Certain White House, National Security Council (NSC) and Homeland Security Council (HSC) Records	Cancels Notice 2017-03	7/16/2021
2021-01 Black Label Letter	06/29/2021 11/29/2023	Rescinding Approval of Pre-1989 General Services Administration (GSA)-Approved Containers Clarification Regarding GSA/IACSE Black Label Phase Out Plan	GSA website address changed in Notice Amended by Notice 2022-03 Rescinds approval in accordance with the phase-out plan listed in ISOO NOTICE 2021-01	04/03/2026 8/18/2022 01/09/2024
2020-02	08/24/2020	Transmitting Classified Information
2018-01	01/16/2018	Declassification Date or Event Markings Clarification
2017-04	09/14/2017	Security Classification Guides
2017-02	04/17/2017	Clarification of Classification by Compilation
2015-01	06/05/2015	Withholding Authorities for Mandatory Declassification Review
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	GSA website address changed in Notice	04/02/2026
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”
2013-03	04/10/2013	Processing of Mandatory Declassification Review Requests Appealed to the Interagency Security Classification Appeals Panel
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
2009-07	01/08/2009	Mandatory Declassification Review – Inappropriate Citation of Section 6.2(d) of E.O. 13526
2009-04	10/10/2008	“Best Practices” for Declassification Review Record Keeping	Reviewed	04/26/2010
2009-03	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

*The following Notices have been canceled:
2009-05, 2009-06, (2009-08 through 2009-16), 2010-02, 2011-01, 2013-02, 2013-04, 2014-04, (2015-02 through 2015-05), 2017-01, 2017-03, 2019-01, 2020-01, 2020-03.

CUI Notices and Executive Agent Guidance Issued Prior to 2026

Number	Date	Title
CUI Notice 2022-01	09/07/2022	Executive Agent Guidance Regarding White House National Security Council (NSC) Memorandum, “Initiating a Process to Review Information Management and Classification Policies,” June 2, 2022.
CUI Notice 2020-07	10/05/2020	Using Alternate Designation Indicators (ADI) with CUI
CUI Notice 2020-06	10/05/2020	Limited Marking Waiver Best Practices to Alert Users of CUI
CUI Notice 2020-05	08/25/2020	Using Exigent Circumstances Waivers
CUI Notice 2020-04	06/16/2020	Assessing Security Requirements for CUI in Non-Federal Information Systems
CUI Notice 2020-03 CUI Notice 2020-03a	06/03/2020	CUI Non-Disclosure Agreement Template Memo CUI Non-Disclosure Agreement Template (Attachment)
CUI Notice 2020-02	06/03/2020	Alternate Marking Methods
CUI Notice 2020-01	05/14/2020	CUI Program Implementation Deadlines (supersedes CUI Notice -2018-03 dated March 13, 2018, and CUI Notice 2016-01 dated September 14, 2016)
CUI Memo 2020-03-30	03/30/2020	Applying an Exigent Circumstances Waiver to CUI Safeguarding Requirements while Teleworking in Response to the COVID-19 Pandemic
CUI Notice 2019-04	09/06/2019	Oversight of the CUI Program within Private Sector Entities
CUI Notice 2019-03	07/15/2019	Destroying CUI in Paper Form (supersedes CUI Notice 2017-02 dated August 17, 2017)
CUI Notice 2019-02 CUI Notice 2019-02a	05/13/2019	CUI Program Manager Position Description Attachment for CUI Notice 2019-02
CUI Notice 2019-01	02/22/2019	CUI Coversheet and Media Labels
CUI Joint Memo 2018-11-19	11/19/2018	Decontrolling CUI in response to a FOIA request
CUI Notice 2018-07	11/16/2018	CUI Limited Dissemination Controls
CUI Notice 2018-06	11/16/2018	Establishing, Eliminating or Modifying Categories of CUI
CUI Notice 2018-04	11/16/2018	Provisional Categories (supersedes CUI Office Notice 2013-01 dated May 22, 2013)
CUI Notice 2018-05	10/24/2018	Implementation Guidance when CUI is commingled with CNSI
CUI Memo 2018-10-16	10/16/2018	CUI Senior Agency Official/Program Manager Change Form
CUI Notice 2018-02	01/24/2018	Recommendations for CUI Basic Training
CUI Notice 2018-01	01/24/2018	Guidance for Drafting Agreements with Non-Executive Branch Entities involving CUI
CUI Notice 2017-01	06/12/2017	Implementation Recommendations for the CUI Program
CUI Handbook 2016-12-06	12/06/2016	Marking CUI Rev 1.1 (Marking Handbook)
CUI Joint Memo 2014-07-03	07/03/2014	Revised Guidance regarding CUI and the Freedom of Information Act (supersedes joint issuance dated November 22, 2011)
CUI Memo 2013-04-11	04/11/2013	Appointments of Senior Agency Official and Program Manager for CUI Program Implementation

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