text: Chapter 1
  1-99. The JFC may establish a support relationship between functional and Service component commanders.
  Conducting operations across a large operational area often involves both the land and air component
  commanders. The JTF commander places the joint force land component in general support of the air
  component until the latter achieves air superiority. Conversely, in the land AO, the JFLCC becomes the
  supported commander and the air component commander provides close air support.
  1-100. When a field army or corps headquarters becomes the joint force land component as part of a JTF,
  normally subordinate Army units are attached, and OPCON is inherent. Marine Corps forces made available
  to a joint force land component are normally under TACON, but the JFC may specify an OPCON
  relationship. (See JP 3-31 for more information on OPCON relationships.) The JFLCC makes
  recommendations to the JFC on properly using attached, OPCON, or TACON assets; planning and
  coordinating land operations; and accomplishing operational missions.
  1-101. When the Secretary of Defense assigns Army forces to a combatant command, the transfer is either
  permanent or the duration is unknown but very lengthy. The combatant commander exercises COCOM over
  assigned forces. When the Secretary of Defense allocates Army units (from United States Army Forces
  Command [FORSCOM] or a supporting combatant command) to another combatant command, the transfer
  of units is temporary. Allocated forces normally return to their parent combatant command at the end of the
  deployment. The combatant commander exercises OPCON of the allocated force. In either case, the
  combatant commander normally exercises OPCON over Army forces through the ASCC until the combatant
  commander establishes a JTF and functional components. At that time, the combatant commander delegates
  OPCON to the JTF commander. When the JFC establishes any command relationship (including a joint
  support relationship), the theater army clearly specifies sustainment responsibilities for all affected Army
  commanders.
  ADMINISTRATIVE CONTROL
  1-102. Administrative control is the direction or exercise of authority over subordinate or other
  organizations in respect to administration and support (JP 1). This administration and support includes
  organization of Service forces, control of resources and equipment, personnel management, unit logistics,
  individual and unit training, readiness, mobilization, demobilization, discipline, and other matters not
  included in the operational missions of the subordinate or other organizations. It is a Service authority, not a
  joint authority.
  1-103. ADCON is exercised under the authority of and is delegated by the Secretary of the Army. ADCON
  is synonymous with the Army’s 10 USC authorities and responsibilities. (See AR 10-87 for more information
  on ADCON.) Unless modified by the Secretary of the Army, administrative responsibilities normally flow
  from the Department of the Army through the ASCC to those Army forces assigned, attached, or OPCON to
  that combatant command. As the ASCC, the theater army delegates ADCON authorities and responsibilities
  as required to Army forces attached by the combatant commander to a joint (or joint and multinational) task
  force. The ARFOR commander exercises delegated ADCON of Army forces within that JTF as specified by
  the theater army commander.
  OVERLAPPING OPERATIONAL AND ADMINISTRATIVE CHAINS
  1-104. Typically, Army units are either assigned or attached to other Army units and ADCON
  responsibilities for those units accompanies this command relationship. Any ADCON responsibilities not
  transferred to the gaining command are specified in the order. In circumstances where Army units are
  OPCON or TACON to another Army unit, the order should specify what ADCON responsibilities shift to
  the gaining command. Similarly, when an Army headquarters receives OPCON of forces from other Services,
  any specific support requirements should be detailed in the order. In some limited contingency operations,
  the JFC may elect to employ Marine Corps and Army forces as Service components, instead of creating a
  functional joint force land component. In that case, the ARFOR and Marine Corps forces would exercise
  OPCON and ADCON over their respective Service forces. This arrangement may occur in a forcible entry
  operation due to the complexity of parachute, air, and amphibious operations and limited time available for
  joint integration. As soon as the JOA matures with the arrival of follow-on forces and headquarters, the JFC
  may establish a joint force land component command.