Classified National Security Information (CNSI) Guidance

From the Information Security Oversight Office (ISOO)

The National Archives and Records Administration (NARA) Information Security Oversight Office (ISOO) issues guidance to Federal agencies on classifying, safeguarding (to include marking), and declassifying national security information (CNSI). In the list below, you can search, access, and read our current CNSI guidance. You can find additional CNSI resources, links to governing regulations, and more at the ISOO website.

https://www.archives.gov/files/isoo/notices/isoo-notice-2021-01-rescd-approval-pre-1989-gsa-safes-final.pdf

Show entries

Number	Date issued	Title	General topic	Summary	Date posted to portal	Status	Date of status change
ISOO Notice 2021-03	10/05/2021	Applying to the Technology Modernization Fund (TMF) to support classification and declassification improvements	technology	Informs agencies of the option to apply for TMF funding to support technology efforts in classification, declassification, and CUI marking and other system improvements.	10/05/2021
ISOO Notice 2021-02	7/16/2021	Partial Waiver for the Declassification Review of Certain White House, National Security Council (NSC) and Homeland Security Council (HSC) Records	Declassification review	Expands and revises waiver for declassification review that was established in ISOO Notice 2017-03. Except for certain categories, agencies do not need to refer to the NSC staff for declassification review White House, NSC, and HSC records created prior to January 20, 2009, that are designated for transfer to the National Archives after declassification.	7/16/2021	Cancels Notice 2017-03	7/16/2021
ISOO Notice 2021-01	6/29/2021	Rescinding Approval of Pre-1989 General Services Administration (GSA)-Approved Containers	containers, vaults	Informs agencies that older containers and vault doors will be phased out of use for securing classified information, based on GSA rescinding approval for such old containers.	10/02/2020
ISOO Notice 2020-03	10/02/2020	COVID-19 Emergency Authorities for Classified National Security Information	COVID-19	Reminds agencies of emergency authorities, applies those authorities to the COVID-19 pandemic, sets out limitations on authorities, and informs agencies to check this guidance periodically for updates as the COVID-19 situation evolves.	10/02/2020
ISOO Notice 2020-02	08/24/2020	Transmitting Classified Information	Mailing	Reminds agencies of requirements they must meet for sending classified information through the U.S. Postal Service (USPS) or by means of commercial carriers.	08/24/2020
ISOO Notice 2020-01	05/12/2020	COVID-19 guidelines and alternative operating methods for alarm monitoring industry	Industrial security	Outlines agency emergency authorities to establish additional security requirements, and in particular addresses alarm monitoring requirements during the COVID-19 remote operations situation.	05/14/2020
ISOO Notice 2019-01	09/27/2019	Agencies Eligible to Receive Referrals from Automatic Declassification at 25, 50, and 75 Years	Declassification	Lists agencies that the Interagency Security Classification Appeals Panel (ISCAP) has approved to receive referrals resulting from automatic declassification reviews and that may exempt specific information from automatic declassification.	02/19/2020	Cancels ISOO Notice 2015-05	09/27/2019
ISOO Notice 2018-01	01/16/2018	Declassification Date or Event Markings Clarification	Declassification	Guidance on using an event for declassification and including a date that will not extend the classification period beyond the currently approved period.	02/19/2020
ISOO Notice 2017-04	09/14/2017	Security Classification Guides	Security classification guides	Outlines requirements for security classification guides and recommends a standard format for the guides to promote consistency for security classification guidance throughout the executive branch.	02/19/2020
ISOO Notice 2017-02	04/17/2017	Clarification of Classification by Compilation	Classification decisions	Outlines when a compilation of unclassified information must undergo an original classification decision and who must make that decision.	02/19/2020

Showing 1 to 10 of 38 entries

Superseded / Cancelled ISOO Guidance

PDF files require the free Adobe Reader.
More information on Adobe Acrobat PDF files is available on our Accessibility page.

Top