JP 3-28, page 24

Chapter I I-2 JP 3-28 e. The United States Coast Guard (USCG) performs national defense, maritime safety, security, and stewardship roles and missions. USCG forces normally integrate into the National Response Framework (NRF) and remain under the operational control (OPCON) and administrative control (ADCON) of the USCG to execute its statutory missions. The USCG, when performing statutory roles and missions, may be supported by DOD conducting DSCA. For additional information, see Department of Defense Directive (DODD) 3025.18, Defense Support of Civil Authorities (DSCA); FEMA Publication, Integrated Planning Refinement and Implementation Guidance; Army Techniques Publication (ATP) 3- 28.1/Marine Corps Reference Publication (MCRP) 3-30.6/Navy Tactics, Techniques, and Procedures (NTTP) 3-57.2/Air Force Tactics, Techniques, and Procedures (AFTTP) 3- 2.67, Multi-Service Tactics, Techniques, and Procedures for Defense Support of Civil Authorities (DSCA); Department of Defense Instruction (DODI) 3025,22, The Use of the National Guard for Defense Support of Civil Authorities; and Coast Guard Publication 3- 28, Incident Management and Crisis Response. 2. Defense Support of Civil Authorities a. DSCA is support provided by federal military forces; DOD civilians; DOD contract personnel; and DOD component assets, to include NG forces (when SecDef, in coordination with the governors of the affected states, elects and requests to use and fund those forces in Title 32, USC, status), in response to a request for assistance (RFA) from civil authorities for domestic emergencies, cyberspace incident response, law enforcement support, and other domestic activities or from qualifying entities for special events. DSCA includes support to prepare, prevent, protect, respond, and recover from domestic incidents. DSCA is provided in response to requests from civil authorities and upon approval from appropriate authorities. DSCA is only conducted in the US homeland. In accordance with Department of Defense Manual 5200.01, Volume 3, Department of Defense Information Security Program: Protection of Classified Information, the homeland is “the physical region that includes the continental United States, Alaska, Hawaii, United States possessions and territories, and surrounding territorial waters and airspace.” Furthermore, Department of Defense Directive (DODD), 3025.18, Defense Support of Civil Authorities (DSCA), specifies defense support of civil authorities is executed “within the United States, including the District of Columbia, the Commonwealth of Puerto Rico, the United States Virgin Islands, Guam, American Samoa, the Commonwealth of the Northern Mariana Islands, and any territory or possession of the United States or any political subdivision thereof.” Additionally, the National Cyber Incident Response Plan; Presidential Policy Directive-41, US Cyber Incident Coordination Policy; and Directive Type Memorandum 17-007, Interim Policy and Guidance for Defense Support to Cyber Incident Response, includes cyberspace. Various Sources