Except as otherwise expressly provided, all the provisions of this article shall apply to every multiple dwelling erected after April eighteenth, nineteen hundred twenty-nine. Except as otherwise expressly provided, only the following enumerated sections of this article, and then only to the extent required therein, shall apply to multiple dwellings, whether class A or class B, erected before such date: § 28. Two or more buildings on 59. Bakeries and fat boiling same lot 60. Motor vehicle storage

1. 29. Painting of courts and 61. Business uses shafts 62. Parapets, guard railings
2. 31. Size of rooms--subdi- and wires--subdivision two vision six 66. Lodging houses
3. 33. Cooking spaces 67. Hotels and certain other
4. 35. Entrance doors and class A and B dwellings lights 75. Water supply
5. 37. Artificial hall lighting 76. Water-closet and bath
6. 50-a. Entrances: doors, accommodations locks and intercommunication 77. Plumbing and drainage systems 78. Repairs
7. 52. Stairs 79. Heating
8. 55. Wainscoting 80. Cleanliness
9. 56. Frame buildings and 81. Receptacles for waste extensions matter
10. 57. Bells; mail receptacles 83. Janitor or housekeeper
11. 58. Incombustible materials