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NIST Special Publication 800-53, Revision 5 Security and Privacy Controls for Federal Information Systems and Organizations NIST Special Publication 800-171, Revision 2 Protecting Controlled Unclassified Information in Nonfederal Information Systems and Organizations
Provides guidance for the correct marking of classified national security information (CNSI) pursuant to Executive Order (E.O.) 13526 and Part 2001 of Title 32, Code of Federal Regulations (CFR).