Section 185(4) in The Coal Mines Regulations, 2011
(4)No glass of a safety lamp and no bulb of an electric safety lamp shall be replaced except by a glass or bulb of such type as the Chief Inspector may, from time to time specify by notification in the Official Gazette, and no other part of a safety lamp, other than a wick or battery, as the case may be, shall be replaced except by a part manufactured by the manufacturers of the lamp to approved specifications.
