Section 136(a) in The Tamil Nadu Building and other Construction Workers (Regulation of Employment and Conditions of Service) Rules, 2006
(a)reliable and effective means of communication such as telephone or walkie-talkie are provided and are maintained in working order for arranging better and effective communication at an excavation or tunneling work at the following locations, namely:-(i)working chamber at the face of an excavation;(ii)intervals of hundred metres along the tunnel;(iii)working chamber side of a man-lock near the door of such man-lock;(iv)interior of each chamber of a man-lock:(v)location conspicuous to a lock attendant's station;(vi)a compressor plant;(vii)a first-aid station; and(viii)outside the portal or the top of a §haft.
