text: Considerations for Defense Support of Civil Authorities
  10 USC) and with the governor for National Guard forces not federalized (operating under 32 USC or State
  Active Duty). The use of armed National Guard forces from one state to perform civil defense or other law
  enforcement operations in another state requires a memorandum of understanding on rules for the use of
  force between the governors of the two states.
  6-11. Limitations on military forces carry over to intelligence collection. Military forces cannot collect
  information in the United States or its overseas possessions. However, military forces can collect and
  analyze information provided by Soldiers, law enforcement, and other agencies. This affects the personnel
  recovery locate task and the potential deployment of intelligence assets such as unmanned aircraft systems.
  For more information on the use of information, see FM 3-55 and TC 2-91.7.
  PERSONNEL RECOVERY CAPABILITY PHASES
  6-12. A serious disaster often damages critical infrastructure severely enough to disrupt basic government
  functions and emergency services. In these instances, communications, transportation, and commerce are
  degraded, and local response capabilities may be overwhelmed. Local first responders sometimes become
  isolated. The existing civilian capability naturally focuses on the affected population. In these transitional
  circumstances, commanders may not be able to count on civil resources to augment military personnel
  recovery capabilities. This is especially significant in the earlier stages of deployment when units may not
  have their full complement of forces and structures in place.
  6-13. In personnel recovery, capabilities change over time. Figure 6-1 shows the life cycle of Army forces
  supporting civil authorities. The ability of Army forces to report, locate, support, and recover varies widely
  over time. The cross-section of the response may not mimic the curve shown, but it generally proceeds
  through the following four phases:
  * Initial minimum personnel recovery capability phase.
  * Optimal personnel recovery capability phase.
  * Residual personnel recovery capability phase.
  * Final minimum personnel recovery capability phase.
  Figure 6-1. Personnel recovery capability phase
  INITIAL MINIMUM PERSONNEL RECOVERY CAPABILITY PHASE
  6-14. During this initial phase, response forces are least able to react to isolation incidents. Often response
  forces contend with the confusion of the initial entry when Army forces are establishing themselves in the
  AOs, understanding the magnitude of the disaster, and forming command and support relationships with
  civil authorities. If the cause of the emergency is still present, such as an ongoing chemical spill or a
  persistent outbreak of disease, this initial phase may extend well into the buildup of forces. During this
  phase, the readiness of forces to assume the tasks and the buildup of the capabilities of the civil authority
  tiered response depends on firm leadership. The commander establishes the personnel recovery structure
  and expands it. Commanders and staffs become familiar with the mission. This is often when the initial
  isolation incidents occur that force the personnel recovery system to operate.