Military manual · JP 3-28
JP 3-28, page 48
Defense Support of Civil Authorities
Joint Publication: Defense Support of Civil Authorities
…Command and Control in United States Northern Command and United States
Pacific Command Areas of Responsibility
a. Supported CCDR. For DSCA operations, SecDef designates a supported CCDR.
Ordinarily, this will be CDRUSNORTHCOM for the continental United…