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A security level is

[t]he combination of a hierarchical classification and a set of nonhierarchical categories that represents the sensitivity of information.[1]
[a] clearance and a set of designators of special access approval or a classification and a set of such designators, the former applying to a user, the latter applying, for example, to a computer object.[2]


  1. Department of Defense, National Computer Security Center, Glossary of Computer Security Terms (NCSC-TG-004, Ver. 1) (Oct. 21, 1988).
  2. Glossary of Security Terms, Definitions, and Acronyms, at 218-19.

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