Section 176(2) in The Coal Mines Regulations, 2017
(2)In every mine or part thereof to which regulation 168 applies, every electrical lighting apparatus shall be of a type approved by the Chief Inspector:Provided that electric lighting from a source of electric power enclosed in the lighting unit, electric lights which are fittings or accessories to machinery or electrical plant including signalling apparatus, and any other means of lighting not specifically mentioned in the regulation, may be used in the mine if so permitted by the Chief Inspector by an order in writing and subject to such conditions as he may specify therein.
