Department of Defense
INSTRUCTION
NUMBER 3025.23
May 25, 2016
USD(P)
SUBJECT: Domestic Defense Liaison with Civil Authorities
References: See Enclosure 1
1. PURPOSE. This instruction:
a. Establishes policy, assigns responsibilities, and prescribes procedures for DoD to provide
liaison for defense support of civil authorities (DSCA), also known as civil support, in
accordance with the authority in DoD Directive (DoDD) 5111.1 (Reference (a)) and Deputy
Secretary of Defense (DepSecDef) Memorandum (Reference (b)). This includes facilitating
DSCA through participation in integrated federal and U.S. Governmental incident and civil
emergency response, deliberate events (e.g., National Special Security Events (NSSEs), Special
Event Assessment Rating (SEAR) events), and supporting preparedness activities, pursuant to
DoDD 3025.18 (Reference (c)).
b. Provides guidance for the use of DSCA liaison personnel, as described in the policy of
this instruction.
2. APPLICABILITY. This instruction:
a. Applies to:
(1) OSD, the Military Departments, the Office of the Chairman of the Joint Chiefs of
Staff (CJCS) and the Joint Staff, the Combatant Commands, the Office of the Inspector General
of the Department of Defense, the Defense Agencies, the DoD Field Activities, and all other
organizational entities within DoD (referred to collectively in this instruction as the “DoD
Components”).
(2) The State National Guard when ordered to duty pursuant to section 502(f) of Title 32,
U.S.C. (Reference (d)), as appropriate.
b. Does not apply to:
