Section 79A(4)(c) in The Tamil Nadu Cinemas (Regulation) Rules, 1957
(c)The compound walls around the premises shall be so constructed that the front portion and a portion of the adjacent two sides shall be masonry construction of sufficient height so as to prevent outsiders causing inconveniences when the shows are on within the premises With side wide open and the remaining portion be of barbed wire fencing so that when the show is on with the side cladding thrown open, it may not give room to outsiders to peep over the compound wall into the cinemas.