scope:

PURPOSE. Under the authorities vested in the Secretary of Defense by title 10, United States Code (U.S.C.); title 44, U.S.C.; title 50, U.S.C.; Executive Order (E.O.) 12333; and National Security Directive 42 (References (a) through (e), respectively) and pursuant to DoD Directives (DoDDs) 5143.01 and 5144.1 (References (f) and (g)), this Directive reissues DoDD 5100.20 (Reference (h)) to update the mission, organization and management, responsibilities and functions, relationships, authorities, and administration of NSA/CSS, incorporating and cancelling DoDD 5100.23 (Reference (i)). This Directive shall be interpreted consistent with law, policy, and directive, including, as applicable, those related to the Director of National Intelligence (DNI).

APPLICABILITY. This Directive applies to OSD, the Military Departments (including the Coast Guard at all times, including when it is a Service in the Department of Homeland Security by agreement with that Department), the Office of the Chairman of the Joint Chiefs of Staff and the Joint Staff, the Combatant Commands, the Office of the Inspector General of the Department of Defense, the Defense Agencies, the DoD Field Activities, and all other organizational entities in the Department of Defense (hereafter referred to collectively as the "DoD Components").