212. Handling of explosives.- The employer shall ensure at a construction site of a building or other construction work that- (a) all explosives are handled, used or stored in accordance with the instructions and the material data sheet supplied by the manufacturer of such explosives; (b) the use of explosives is carried out in safe manner to avoid injury to any person and under the direct supervision of a responsible person; (c) before using any explosive, necessary warning and danger signals are erected, at conspicuous places of such use to warn the building workers and the general public of the danger involved in such use; | 
