text: Fire Support Coordination Measures
  B-11. The establishing commander adjusts the location of the FSCL as required to keep pace with operations.
  A series of disseminated "on-order" FSCLs will help accelerate the coordination required. The establishing
  commander quickly transmits the change to higher, lower, adjacent, and supporting HQ to ensure that
  appropriate controlling agencies coordinate engagement operations. Changes to the FSCL require notification
  of all affected forces within the AO and must allow sufficient time for these forces and/or components to
  incorporate the FSCL change. Current technology and collaboration tools between the elements of the joint
  force determine the times required for changing the FSCL.
  B-12. Varying capabilities for acquisition and engagement may exist among adjacent commanders in a
  multinational operation. Normally, commanders at senior tactical echelons establish an FSCL to support their
  operations. Layered FSCLs and multiple, separate, noncontiguous corps and/or MAGTF FSCLs positioned
  at varying depths, create a coordination and execution challenge for supporting commanders (e.g., tracking
  effective times, lateral boundaries, and multiple command guidance). In cases such as these, when the
  components share a mutual boundary, the JFC or a designated component commander may consolidate the
  operational requirements of subordinates to establish a single FSCL. When possible, a single FSCL best
  facilitates air ground operations synchronization.
  FREE-FIRE AREA
  B-13. A free-fire area is a specific region into which any weapon system may fire without additional
  coordination with the establishing headquarters (JP 3-09). Where indirect fires and aircraft share an FFA,
  consider establishing an airspace coordination area to assist in deconfliction. Only the military commander
  with jurisdiction over the area (usually, a division or higher commander) may establish an FFA. Preferably,
  the FFA should be located on identifiable terrain; however, grid coordinates or the Global Area Reference
  System may be used to designate the FFA.
  B-14. The FFA is graphically portrayed (see figure B-3 on page B-6) by a solid black line defining the area
  and the letters "FFA" within, followed by the establishing HQ and the effective date-time-group. For more
  information on establishment of a free-fire area see FM 1-02.2.