Department of Defense Instruction: Handling Protest, Extremist, and Criminal Gang Activities Among Members of the Armed Forces [open pdf - 302KB]
From the Document: "Establishes DoD policy, assigns responsibilities, and provides procedures for handling protest, extremist, and criminal gang activities by members of the Armed Forces. [...] This Instruction applies to OSD [United States Office of the Secretary of Defense], the Military Departments (including the Coast Guard at all times, including when it is a Service in the Department of Homeland Security by agreement with that Department), the Office of the Chairman of the Joint Chiefs of Staff 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 in the Department of Defense (hereafter referred to collectively as the 'DoD Components')."
Department of Defense Instruction Number 1325.06
United States Department of Defense: https://www.defense.gov/