All the buildings and erections within the cinema or multiplex premises and the floor roof ceiling, balconies, galleries, tiers, partitions and every room, lobby, corridor, passages and staircases in such buildings and erections intended for the exclusive use of the public during the performance shall be constructed of fire resisting materials and all steel and cast iron trusses and columns, piers, stanchions, shall be protected by fire resisting materials, namely, I.S. specifications such as those specified in Schedule 'B':
Provided that the following materials may be used for the ceiling and walls, namely:-
(1) Compressed cane or wood fiber board, imperforated and perforated;
(2) Wood particle board;
(3) Compressed wood wool;
(4) Mineral or glass wool quiltes and nuts;
(5) Mineral or compressed glass wool tiles.
(6) Composite units perforated board (hard board, asbestos board or metal sheet) backed by mineral or glass wool quilt or slab;
(7) Special absorbers constructed of hard board teak ply, backed by air; floor of the highest part of the tires, gallery or balcony and the lowest part of the roof ceiling over the same shall not in any part be less than 3.35 meters. The height between any tier, gallery or balcony and the ceiling of soffit of another tier, gallery or balcony above it shall in no case be less than 2.75 meters.
(8) Composite units of perforated hard-board backed by perforated fiber board; and
(9) Plaster of Paris, etc., and other similar materials approved by the Licensing Authority.