This United States Army regulation, Army Regulation AR 840-10 Heraldic Activities: Flags, Guidons, Streamers, Tabards, and Automobile and Aircraft Plates July 2020, prescribes Department of the Army policy for unit and individual authorized flags, guidons, and streamers. It prescribes procedures for the display and supply of flags. This regulation applies to the Regular Army, the Army National Guard/Army National Guard of the United States and the U.S. Army Reserve. This regulation is required during mobilization.This regulation prescribes the design, acquisition, display, disposition, and use of flags, guidons, streamers, automobile and aircraft plates, and tabards by Department of the Army (DA) organizations and personnel. It is the authority for these items and their basis of issue. It also describes the flags used by the President, Vice President, officials of the Department of Defense (DOD), and the Chairman of the Joint Chiefs of Staff (JCS).