§ 50 Entrance halls
§ 50-A Entrances: doors, locks and intercommunication systems
§ 50-C Rights of tenants to operate and maintain a lobby attendant service
§ 51 Shafts, elevators and dumbwaiters
§ 51-A Peepholes
§ 51-B Mirrors in connection with self-service elevators
§ 51-C Rights of tenants to install and maintain locks in certain entrance doors
§ 52 Stairs
§ 53 Fire-escapes
§ 54 Cellar entrance
§ 55 Wainscoting
§ 56 Frame buildings and extensions
§ 57 Bells; mail receptacles
§ 58 Incombustible materials
§ 59 Bakeries and fat boiling
§ 60 Motor vehicle storage
§ 61 Business uses
§ 62 Parapets, guard railings and wires
§ 63 Sub-curb uses
§ 64 Lighting; gas meters; gas and oil appliances
§ 65 Boiler rooms
§ 66 Lodging houses
§ 67 Hotels and certain other class A and class B dwellings
§ 68 Smoke detecting devices