JP 3-28, page 34

Chapter I I-12 JP 3-28 not permit approval from higher authority, commanders can respond to save lives, prevent human suffering, or mitigate great property damage under imminently serious conditions within the US. Refer to DODD 3025.18, Defense Support of Civil Authorities (DSCA), for a full explanation of the requirements and constraints of immediate response authority. The commander exercising immediate response authority reports all activities using DOD protocols, not lead agency or local authority mechanisms. (2) DOD components do not perform any function of civil government unless authorized. Refer to DODI 3025.21, Defense Support of Civilian Law Enforcement Agencies, for DOD policy on providing military support, including personnel and equipment, to law enforcement agencies (LEAs). Additionally, DOD resources may also respond to search and rescue (SAR) cases on an “ask not task” basis with a federal mission number from either the Air Force Rescue Coordination Center (AFRCC) or the Alaska Rescue Coordination Center (AKRCC). c. DOD Intelligence Component Support to Civil Authorities and LEAs and Intelligence Oversight. Commanders and staffs must carefully consider the legal and policy limits imposed on intelligence activities in support of LEAs and on intelligence activities involving US citizens and entities by intelligence oversight regulations, policies, and executive orders (EOs). This oversight includes incident awareness and assessment (IAA) activities and products. No intelligence activities should take place while conducting DSCA unless authorized by appropriate authorities IAW EO 12333, United States Intelligence Activities; DODD 5240.01, Defense Intelligence Activities; DODM 5240.01, Procedures Governing the Conduct of DOD Intelligence Activities; DODI 3025.21, Defense Support of Civilian Law Enforcement Agencies; and DOD 5240.1-R, Procedures Governing the Activities of DOD Intelligence Components that Affect United States Persons. For more information, see Appendix E, “Key Legal and Policy Documents.”