Any business as defined herein shall be equipped with a functioning surveillance camera during those hours the business is open or any employee is present. The surveillance camera shall be positioned so as to record on film or videotape the image of all persons entering the business and/or all persons approaching within five (5) feet of the cash register. All proposed installations and positioning of a surveillance camera shall be submitted in advance to the Mount Vernon Police Department for determination and approval that the same meets the requirements set out in this chapter. All surveillance tapes shall be retained by the business for forty-five (45) days.