Section 61(3) in The Tamil Nadu Cinemas (Regulation) Rules, 1957
(3)Every staircase forming an exit from an upper gallery or tier of the auditorium shall be enclosed on both sided with walls of brick or fire-resisting materials in the storeys through which it passes and no opening shall be made into auditorium except the one required for exit from the gallery or tier which it serves:Provided that staircases leading to the first or lower gallery or tier may be left open on one side in which case the open side shall be provided with extra stout handrails and balusters, but in no case shall staircases be left open on both sides.
