This instruction implements AFPD 10-8, "Air Force Support to Civil Authorities," Department of Defense (DoD) Directive 3025.1, "Military Support to Civil Authorities (MSCA)," DoD Directive 3025.15, "Military Assistance to Civil Authorities (MACA)," and DoD Directive 3025.16, Military Emergency Preparedness Liaison Officer (EPLO) Program. It provides guidance for Air Force personnel on MSCA focusing on the assignment and allocation of Air Force resources to support civilian authorities. AFNSEP realigned under the Directorate of Homeland Security (AF/XOH). The National Security Emergency Preparedness Policy is further explained. Air Force Director HLS, as the Deputy Director of Military Support (DOMS), responsibilities are defined. Air Force National Security Emergency Preparedness (AFNSEP) Office responsibilities are expanded and consolidated under one paragraph. The revision further defines the duties of the Principal Planning Agent (PPA), Regional Planning Agents (RPA), and MAJCOMs. Reporting instructions are clarified. The Aerospace Expeditionary Force (AEF) Center is identified as the organization that will nominate units to support MSCA in the CINC and Regional Planning Agent (RPA) Time Phase Force Deployment Data (TPFDD). DoD Directive 3025.1 and DoD Directive 3025.15 definitions are included.