text: Appendix B
  command. (FM 3-94) It consists of the senior Army headquarters and all Army forces that the CCDR
  subordinates to the JTF or places under the control of a multinational force commander. The ARFOR
  becomes the conduit for ADCON functions specified in unit deployment orders. (See FM 3-94 and JP 3-0
  for more information on ARFOR.)
  JOINT COMMAND RELATIONSHIPS
  B-6. JP 1, Volume 2 specifies and details four types of joint command relationships. They are—
  (cid:122) Combatant command (command authority) (COCOM).
  (cid:122) Operational control.
  (cid:122) Tactical control.
  (cid:122) Support.
  COMBATANT COMMAND (COMMAND AUTHORITY)
  B-7. COCOM is the command authority over assigned and allocated forces vested only in commanders of
  combatant commands or as directed by the President or the Secretary of Defense in the Unified Command
  Plan and cannot be delegated or transferred. COCOM only extends to those forces assigned or allocated to
  the combatant command by the Secretary of Defense. COCOM is established in federal law by Section 164,
  Title 10, United States Code (USC). Normally, the CCDR exercises this authority through subordinate JFCs,
  Service components, and functional component commanders. COCOM includes the directive authority for
  logistics.
  OPERATIONAL CONTROL
  B-8. The authority to exercise OPCON is exclusively derived from COCOM authority. Forces provided by
  the Services and attached to a combatant command are typically in an OPCON command relationship.
  OPCON is the authority to perform those functions of command over subordinate forces involving—
  (cid:122) Organizing and employing commands and forces.
  (cid:122) Assigning tasks.
  (cid:122) Designating objectives.
  (cid:122) Giving authoritative direction necessary to accomplish missions.
  B-9. OPCON normally includes authority over all aspects of operations and joint training necessary to
  accomplish missions. It does not include directive authority for logistics or matters of administration,
  discipline, internal organization, or unit training. OPCON does include the authority to delineate functional
  responsibilities and operational areas of subordinate JFCs. In two instances, the Secretary of Defense may
  specify adjustments to accommodate authorities beyond OPCON in an establishing directive: when
  transferring forces between CCDRs or when transferring members or organizations from the military
  departments to a combatant command. Adjustments will be coordinated with the participating CCDRs.
  TACTICAL CONTROL
  B-10. TACON is inherent in OPCON. TACON may be delegated to and exercised by commanders at any
  echelon at or below the level of combatant command. TACON provides sufficient authority for controlling
  and directing the application of force or tactical use of combat support assets within the assigned mission or
  task. TACON does not provide organizational authority or authoritative direction for administrative and
  logistics support; the commander of the parent unit continues to exercise these authorities unless otherwise
  specified in the establishing directive.
  JOINT SUPPORT RELATIONSHIPS
  B-11. Support is a command authority in joint doctrine. A superior commander establishes a supported and
  supporting relationship between subordinate commanders when one organization should aid, protect,
  complement, or sustain another force. Designating supporting relationships is important. It conveys priorities
  to commanders and staffs planning or executing joint operations. Designating a support relationship does not