Not less frequently than every six (6) months, the owner or operator
of each premises in the village (except a premises used only for a single-family
residence) wherein an elevator or escalator is located shall file with the
Village Clerk a certificate of inspection and testing from an acceptable elevator
company or insurance company, certifying that each elevator and escalator
at the premises is in proper working order and in compliance with all applicable
codes and generally accepted standards, and each elevator cab has within it
a mirror or mirrors so placed in the rear of the cab as to make the interior
thereof visible to a person prior to entering such elevator cab.