text: Appendix D
  Transition to a Joint Headquarters
  This appendix addresses the transition of Army echelons to a joint headquarters.
  Forming and transitioning an Army echelon into a JTF or joint force land component
  headquarters is a key organizational decision that will influence the conduct of joint
  land operations. This appendix describes the significant activities involved in manning,
  training, and equipping an Army echelon above brigade as it forms and transitions into
  a joint headquarters.
  JOINT HEADQUARTERS OVERVIEW
  D-1. The Army provides the combatant commander with trained and equipped headquarters that can apply
  land power from the theater to the tactical level. Armies, corps, and divisions are the echelons prepared to
  fulfill a joint headquarters role in the conduct of operations. They provide the necessary options for the
  employment of land power in an interdependent joint force. The primary joint headquarters roles these Army
  echelons fulfill is that of the JTF headquarters and the joint land component headquarters.
  JOINT TASK FORCE HEADQUARTERS
  D-2. A JTF headquarters is a joint force headquarters that is constituted and designated by a JFC, such as
  the Secretary of Defense, a combatant commander, a subunified commander, or a state governor (for
  JTF-state). This is done in accordance with the National Security Act of 1947 (50 USC 3001), 10 USC, and
  32 USC.
  D-3. A JFC establishes a JTF headquarters when the scope, complexity, or other factors of an operation
  require capabilities from at least two Military Departments operating under a single JFC. JTF commanders
  are responsible for establishing command relationships between subordinate commanders and for
  accomplishing any operational missions.
  D-4. Based upon the decision of the establishing JFC, the commander of a JTF may exercise OPCON or
  TACON over assigned and attached forces. Establishing authorities for subordinate unified commands and
  JTFs normally direct the delegation of OPCON over forces attached to those subordinate commands. A JFC
  with assigned or attached OPCON forces has the authority to organize to best accomplish the mission. The
  organization of these forces is usually based on the commander’s intent, concept of operations, and the
  consideration of Service organizations. If the commander has TACON of assigned or attached forces, the
  force can be tasked but not reorganized. See Appendix A for more information on command relationships.
  D-5. JTF headquarters’ responsibilities are driven by mission requirements. These requirements further
  drive the required capabilities of the staff, and, ultimately the organization and manning needed to support
  the combatant commander. For instance, the JTF staff must have awareness of joint terminology and
  familiarity with joint staff processes. Also, the commander, JTF, and the commander’s staff have critical
  roles in ensuring unified action.
  Note. A designated Service headquarters can be considered a JTF-capable headquarters once the
  establishing authority (combatant commander) is satisfied with its level of training and readiness.
  D-6. Army echelons above brigade can provide expertise and be the nucleus for JTFs of various sizes and
  durations. This is because Army echelons above brigade are organized for scope and scale. Army echelons
  habitually train personnel and exercise missions to perform command and control in operations requiring
  unified action. Therefore, with augmentation, these echelons have the expertise, knowledge, and staff