Vending machines shall be listed by National Automatic Merchandising Association (NAMA). Electrical shall be 110/120 VAC (60Hz) with interior power safety shut-off switch for servicing, industrial standard surge protector and Ground-Fault Circuit Interrupter (GFCI) protected cord per NEC 2005-Article 422.51. Machines shall be front accessible only for loading of product. The coin box and bill box shall be removable. The currency acceptor shall be of snap-in module with easy access for routine maintenance by visually impaired operators. Dimensions shall be less than or equal to 80” in height and the depth shall be less than or equal to 38”. All machines shall include but not limited to the following features: Price displays or labels. Basic Program capability: individually priced selections, sales logs. Sold out indication. Locks with key, all machines keyed alike. Bill validator shall be able to validate bills in both optical and magnetic tests.