Section 157(a) in Bihar Building and Other Construction Workers (Regulation of Employment and Conditions of Service) Rules, 2005
(a)a bulk-head or air tight diaphragms retaining compressed, air, when used within a tunnel or a shaft, is constructed to withstand the maximum pressure at one point two five times the maximum working pressure of such bulk-head or diaphragm and such bulk-head or diaphragm is tested before its each use by a responsible person referred to in rule 121 to ensure that such bulk-head or diaphragm is in proper working order;
