DOD D 5100.3 11th Edition, February 9, 2011
Support of the Headquarters of Combatant and Subordinate Unified Commands
PURPOSE. This Directive:
a. Reissues DoD Directive (DoDD) 5100.3 (Reference (a)).
b. Pursuant to section 165 of title 10, United States Code (Reference (b)), establishes policy and assigns responsibilities for the administrative and logistical support of Combatant Command headquarters and subordinate unified command headquarters.
c. Provides a DoD-wide definition of Combatant Command Support Agent (CCSA).
APPLICABILITY. This Directive:
a. Applies to OSD, the Military Departments, 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 within the Department of Defense (hereafter referred to collectively as the "DoD Components").
b. Includes the U.S. Element of the North American Aerospace Defense Command (USELEMNORAD), although not a Combatant Command, for headquarters administrative and logistical support purposes only and in accordance with the "Agreement between the Government of the United States of America and the Government of Canada on the North American Aerospace Defense Command" (Reference (c)).
c. Includes the theater special operations commands (TSOCs) listed in Enclosure 3 as subordinate unified commands.