Controlled Unclassified Information (CUI)

CUI Registry: Intelligence-National Security Letter


Category-Subcategory: Intelligence-National Security Letter
Category Description:

Related to intelligence activities, sources, or methods.

Subcategory Description: Related to administrative orders sent to compel the recipients of the letters to provide information to federal investigators.
Marking: INSL



Notes for Safeguarding, Dissemination and Sanction Authorities:

  • Whether CUI is Basic or Specified is determined by the applicable Safeguarding and/or Dissemination Authority for that CUI.
  • Each "Safeguarding and/or Dissemination Authority" citation links to the statute, regulation or government-wide policy authorizing the control of that information as CUI.
  • Each "Sanctions" authority links to the statute, regulation or government-wide policy that includes penalties for CUI misuse of CUI for the associated "Safeguarding and/or Dissemination Authority" on the same line.


Safeguarding and/or Dissemination Authority Basic or
15 USC 1681u(g) (previously 15 USC 1681u(f)) Basic 15 USC 1681u(j) (previously 15 USC 1681u(i))
15 USC 1681u(k) (previously 15 USC 1681u(j))
15 USC 1681u(n) (previously 15 USC 1681u(m))
50 USC 3162(b) Basic  



Authority links are updated based on regular re-publication of the United States Code and Code of Federal Regulations, and the CUI Registry maintenance schedule.