Concession services are any food or snack services provided by a Randolph-Sheppard Act vendor, commercial contractor or nonprofit organization (see definition in §102-71.20 of this chapter), in vending facilities such as—

(a) Vending machines;

(b) Sundry facilities;

(c) Prepackaged facilities;

(d) Snack bars; and

(e) Cafeterias.