Section 19(3) in Bihar Cinemas (Regulation) Rules, 1974
(3)Openings not exceeding three in number of each projector shall be permitted in the front face in the projection enclosure, the centre, one of which must not exceed 8 inches square and those on each side 6 inches square. Each opening shall be fitted with an efficient screen of fire-resisting material capable of being operated both from the inside and from outside of the projection enclosure.
