The basic eligibility criteria for the badge consist of satisfactory completion of an air assault training course in accordance with the U.S. Army Training and Doctrine Command's standardized Air Assault Core Program of Instruction or completion of a standard Air Assault Course while assigned or attached to the 101st Airborne Division since 1 April 1974. Vietnam veterans of the 101st Airborne Division and 1st Cavalry Division have sought the retroactive award of the Air Assault Badge for their training and pioneering experience in combat, but the Army has yet to grant their request. Airborne background trimmings When the 101st Airborne Division was converted to air assault, it carried over the wear of the cloth airborne background trimmings (ovals) from its time as an active airborne unit. According to DR 670-1, airborne background trimmings are authorized for organizations designated (by structure, equipment and mission) "Airborne" or "Air Assault" by Headquarters, Department of the Army. The following are airborne background trimmings currently authorized for wear behind the Air Assault Badge: Background trimmings have been denied by the US Army's Institute of Heraldry to other units with a parenthetical designation of “Air Assault” such as the California Army National Guard's 1st Battalion, 184th Infantry Regiment. The rationale given by The Institute of Heraldry was that units outside of the 101st Airborne Division did not have an "air assault mission." The reason various ARNG units were organized according to the Air Assault Modified Table of Organization and Equipment (MTOE) was because such units were authorized fewer personnel and less equipment, thus making them less expensive to operate and maintain. They were not organized with actual air assault missions in mind. Department of the Air Force wear All of the military services can send personnel to the U.S. Army's Air Assault Schools, but only the U.S. Army, U.S. Air Force, and U.S. Space Force allows for the Air Assault Badge to be worn on their uniforms. For several decades only U.S. Air Force personnel attached to the 101st Airborne Division were allowed to wear the badge and only while assigned, paralleling U.S. Army policy from 1974 to 1978 for Army soldiers. However, as of the 17 January 2014 update to uniform instructions, Department of Air Force personnel are authorized to wear the Air Assault Badge along with other special skill badges they have earned through other uniformed services. Maritime services wear The Air Assault Badge