Official websites use .gov
A .gov website belongs to an official government organization in the United States.

Secure .gov websites use HTTPS
A lock ( ) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.

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access level

Definitions:

  A category within a given security classification limiting entry or system connectivity to only authorized persons.
Sources:
CNSSI 4009-2015