text: Human Resources (HR) Support
  1-52. Command and control is the exercise of authority and direction by a properly designated commander
  over assigned and attached forces in the accomplishment of the mission (JP 1). Command and control of all
  HR organizations is driven by mission variables. At higher levels, HR organizations are assigned or attached
  to sustainment units within the sustainment structure or operational units. For example, the TPOC is assigned
  to a theater sustainment command (TSC), and the TG PAT and MMT teams are attached to an HR company
  within the special troop’s battalion (STB) of a sustainment brigade. This command relationship further
  enhances the ability of the HR unit to accomplish its mission set, as the sustainment commander has the
  sustainment assets and resources needed for non-HR related support. Within the sustainment brigade, it is
  the commander’s decision to which subordinate unit the HR organization is assigned or attached.
  Commanders make task organization decisions based on the mission requirements.
  1-53. Echelons above corps, such as the Army Service component command (ASCC) G-1/AG, focus on
  external and internal HR support, while subordinate echelon G-1/AGs and S-1s focus on internal support.
  The HROBs focus on external HR support within the ESC/DSB area of operations (AO). Human resources
  units’ standard requirements code (SRC) 12 are responsible for executing those external requirements (for
  example, postal missions and providing HR support to casualty operations and personnel accountability
  missions) that provides either direct or general support to the G-1/AG and S-1 at all echelons. Commanders
  are responsible for the training readiness authority and mission execution of assigned or attached HR
  organizations. Refer to Department of the Army Pamphlet (DA PAM) 71-32, Force Development and
  Documentation Consolidated Procedures, for information on SRC codes. Refer to ADP 6-0, Mission
  Command: Command and Control of Army Forces, for information on the fundamentals of mission
  command, command and control, and the command and control warfighting function.
  HR ROLES
  1-54. The TSC is the senior sustainment organization for an area of responsibility (AOR). The TPOC is the
  key linkage between the Army Service component command (ASCC) G-1/AG and the TSC. The TSC
  provides centralized sustainment command and control of most deployed sustainment organizations and is
  responsible for planning, controlling, and synchronizing all operational-level sustainment operations for the
  ASCC or joint task force (JTF) during deployment, employment, sustainment, and redeployment. Within the
  TSC, the DMC is the center of gravity to sustain distribution within the theater.
  1-55. The DMC in coordination with each commodity branch (to include the TPOC), develops the theater
  distribution plan for mail and examines current sustainment operations to ensure logistics and personnel
  services contribute to the desired effects of the supported commander. It also monitors and facilitates unit
  deployment/redeployment and reception, staging, onward movement, and integration (RSOI) activities. The
  DMC synchronizes supported commander requirements with distribution capabilities and tracks commodities
  to their destination. Figure 1-5 on page 1-14 depicts a DMC with an assigned TPOC. For specific information
  on the mission and organization of the TSC, DMC, and duties and responsibilities of the TSC/ESC G-1/AG,
  see ATP 4-94, Theater Sustainment Command.