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PART III REGULATIONS APPLYING TO MINES ONLY
20.Cutting off electricity or making safe where firedamp is found either below ground or at the surface
21.Approval of certain equipment for use in safety-lamp mines
22.Means of cutting off electricity to circuits below ground
26.Introduction of battery-powered locomotives and vehicles into safety-lamp mines
27.Storage, charging and transfer of electrical storage batteries
28.Disapplication of section 157 of the Mines and Quarries Act 1954