(a) Army and Air Force Exchange Service (AAFES). The Army and Air Force Exchange Service is a joint command of the Army and Air Force, under the jurisdiction of the Chiefs of Staff of the Army and Air Force, which provides exchange and motion picture services to authorized patrons.

(b) Morale, welfare, and recreation (MWR) activities. Air Force MWR activities are activities operated directly or by contract which provide programs to promote morale and well-being of the Air Force's military and civilian personnel and their dependents. They may be funded wholly with appropriated funds, primarily with nonappropriated funds (NAF), or with a combination of appropriated funds and NAFs.

(c) Nonappropriated funds. Nonappropriated funds are funds generated by Department of Defense military and civilian personnel and their dependents and used to augment funds appropriated by the Congress to provide a comprehensive morale-building, welfare, religious, educational, and recreational program, designed to improve the well-being of military and civilian personnel and their dependents.

(d) Nonappropriated funds instrumentality. A nonappropriated fund instrumentality is a Federal Government instrumentality established to generate and administer nonappropriated funds for programs and services contributing to the mental and physical well-being of personnel.