Controlled Unclassified Information (CUI)

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CUI Category: National Security Letter

Banner Marking: CUI

Category Description: Related to administrative orders sent to compel the recipients of the letters to provide information to federal investigators.
Category Marking: LNSL
Alternative Banner Marking for Basic Authorities: CUI//LNSL

How to Locate the Source Documents for CUI Authorities 

Safeguarding and/or Dissemination Authority Basic or
Specified		 Banner Marking Sanctions
50 USC 3162(b) Basic CUI  
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