Section 211(a) in U.P. Building And Other Construction Workers (Regulation Of Employment And Conditions Of Service) Rules, 2009
(a)a bulkhead 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 five times the maximum working pressure of such bulkhead or diaphragm and such bulkhead or diaphragm is tested before its each use by a responsible person referred to in Rule 126 to ensure that such bulkhead or diaphragm is in proper working order;
