Controlled Unclassified Information (CUI)

CUI Registry

Authorities and Sanctions

Category-Subcategory: Law Enforcement-National Security Letter
Category Description: Related to techniques and procedures for law enforcement operations, investigations, prosecutions, or enforcement actions.
Subcategory Description: Related to administrative orders sent to compel the recipients of the letters to provide information to federal investigators.

Select Safeguarding/Dissemination or Sanction Authority to view statutory/regulatory language in a new window.
Authority links are updated based on regular re-publication of the United States Code and Code of Federal Regulations.

Safeguarding and/or Dissemination Authority Sanctions
50 USC 436(b)

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Controlled Unclassified Information (CUI) >

The U.S. National Archives and Records Administration
1-86-NARA-NARA or 1-866-272-6272

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