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.