(a)

(1) Under the appropriated fund wage system, a “specialized industry” is a Federal activity engaged in the production or repair of aircraft, ammunition, artillery and combat vehicles, communication equipment, electronic equipment, guided missiles, heavy duty equipment, shipbuilding, sighting and fire control equipment, or small arms.

(2) Under the nonappropriated fund wage system a “specialized industry” includes only nonappropriated fund operated eating and drinking places. Additional industries may be considered as specialized industries upon approval of the Office of Personnel Management.