PART B - LEVEL OF CLASSIFICATION

1.  CLASSIFICATION LEVELS.  The designations used to specify levels of
    protection for RD, FRD, and NSI are as follows, in descending order of
    sensitivity:

    a.   Top Secret shall be used only for information whose unauthorized
         disclosure could reasonably be expected to cause exceptionally
         grave damage to the national security.

    b.   Secret shall be used only for information whose unauthorized
         disclosure could reasonably be expected to cause serious damage to
         the national security.

    c.   Confidential shall be used only for information whose unauthorized
         disclosure could reasonably be expected to cause damage to the
         national security.

2.  USE OF THE TERM "UNCLASSIFIED".  Only the three foregoing designations
    can be used to identify a level of classified information.  The term
    "unclassified" is used to indicate information that is not classified
    pursuant to an Executive order or a statute.  Unclassified information
    normally is not marked as such except to distinguish it from classified
    information in a classified document when such a distinction is required
    or serves a useful purpose.  Wholly unclassified documents or material
    normally need not be marked "unclassified" unless such a marking would
    serve a useful purpose.  Note:  Certain unclassified documents may
    require additional markings; for example, Unclassified Controlled
    Nuclear Information (UCNI).

3.  MOSAIC COMPILATION.  Certain information which would otherwise be
    unclassified may require classification when combined or associated with
    other unclassified or classified information.  Classification on this
    basis shall be supported by a written explanation that, at a minimum,
    shall be maintained with the file or referenced on the record copy of
    the document or material containing such information.