56. Every bus or mini-bus shall comply with the following standards:(1) the floor and step covering shall not be so cracked, loose or worn as to constitute a tripping hazard;
(2) stanchions, horizontal bars, grab handles and guard panels shall be securely mounted;
(3) the passenger compartment shall be free of any protrusion that could injure a passenger;
(4) the shock-absorbing material provided by the manufacturer on stanchions, horizontal bars, guard panels or on the benches shall be present and adequate;
(5) the luggage compartment or luggage rack shall be securely mounted and none of its parts shall be missing, broken or damaged.