text: Army Sustainment at Echelon
  Table 2-2. Army command relationships
  Then inherent responsibilities—
  Authorities
  Unless CDR can
  Have modified, Are Establish/ impose
  If relation- command May be ADCON assigned maintain Have gaining unit
  ship is— relation- task – responsib position Provided communic priorities further
  organized liaison to— established
  ship ility goes or AO ations command
  by— by—
  with— through by— with— or support
  — relationship
  of—
  Attached;
  OPCON;
  Organic Organic Organic Organic
  Organic N/A N/A Organic HQ TACON;
  HQ HQ HQ HQ
  GS; GSR; R;
  DS
  Attached;
  OPCON;
  Gaining Gaining Gaining Gaining
  Assigned N/A N/A Gaining HQ TACON;
  HQ HQ HQ HQ
  GS; GSR; R;
  DS
  Attached;
  As required Unit to OPCON;
  Gaining Gaining Gaining Gaining
  Attached by gaining which Gaining HQ TACON;
  HQ HQ HQ HQ
  HQ attached GS; GSR; R;
  DS
  Parent
  unit and
  gaining
  As required OPCON;
  unit; As required
  Gaining Gaining by gaining TACON;
  OPCON gaining Parent HQ by gaining Gaining HQ
  HQ HQ HQ and GS; GSR; R;
  unit may HQ
  parent HQ DS
  pass
  OPCON to
  lower HQ
  As required
  As required
  Gaining Gaining by gaining TACON; GS
  TACON Parent HQ Parent HQ by gaining Gaining HQ
  HQ HQ unit and GSR; R; DS
  HQ
  parent HQ
  Note: In NATO, the gaining unit may not task organize a multinational force. (See TACON.)
  ADCON administrative control HQ headquarters
  AO area of operations N/A not applicable
  ASCC Army Service component command NATO North Atlantic Treaty Organization
  CDR commander OPCON operational control
  DS direct support R reinforcing
  GS general support TACON tactical control
  GSR general support–reinforcing
  Organic
  2-124. Organic forces are those assigned to and forming an essential part of a military organization. Organic
  parts of a unit are those listed in its table of organization for the Army, Air Force, and Marine Corps, and are
  assigned to the administrative organizations of the operating forces for the Navy. Joint command
  relationships do not include the term organic because a JFC is not responsible for the organizational structure
  of units. The organic command relationship is unique in that the relationship is inherent in unit force structure;
  units that have an organic command relationship with a parent unit are an integral part of the parent unit’s
  table of organization and equipment. As a result, the organic command relationship cannot be further
  delegated. Commanders with organic subordinate units may designate any of the other four command
  relationships to the subordinate unit. Commanders with organic subordinate units have ADCON authority
  and responsibility for the subordinate units.