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The National Telecommunications and Information System Security Directives (NTISSD) establish national-level decisions relating to National Telecommunications and Information System Security policies, plans, programs, systems, or organizational delegations of authority. NTISSDs are promulgated by the Executive Agent of the Government for Telecommunications and Information Systems Security, or by the Chairman of the NTISSC when so delegated by the Executive Agent. NTISSDs are binding upon all federal departments and agencies.