# The Coal and Other Mines (Ventilation) Order 1956, Paragraph 15


(1) A person in charge of a detector which is a flame safety-lamp shall not, except with the written permission of the manager of the mine, use any other lamp as his working light.
(2) No person in charge of a detector which is a flame safety-lamp shall when testing for inflammable gas raise the lamp higher than is necessary to allow the presence of gas to be detected.

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Source: https://www.legislation.gov.uk/uksi/1956/1764/schedule/FIRST/paragraph/15 (the official version)
Page: https://openlegislation.uk/coal-and-other-mines-ventilation-order-1956/schedule-FIRST/paragraph-15
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.