# The Coal and Other Mines (Safety-Lamps and Lighting) Order 1956, Paragraph 20


(1) Electric lights which are fittings of or accessories to any machinery or electrical apparatus (including signalling apparatus) and which are of a type approved by the Minister are hereby authorised to be used in mines in which the use of lamps or lights, other than permitted lights, is unlawful (either throughout or in any part), and accordingly such lights are permitted lights in those mines.
(2) It shall be the duty of the manager to ensure that any such lights are maintained and tested in the manner. (if any) specified in the relevant approval.

---
Source: https://www.legislation.gov.uk/uksi/1956/1765/schedule/FIRST/paragraph/20 (the official version)
Page: https://openlegislation.uk/coal-and-other-mines-safety-lamps-and-lighting-order-1956/schedule-FIRST/paragraph-20
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.