# The Coal and Other Mines (Safety-Lamps and Lighting) Order 1956, Paragraph 4


It shall be the duty of the manager of every mine to ensure that every bulb used in an electric safety-lamp of a type for the time being approved by the Minister for general use by workmen is a bulb—
(a) of a type approved by the Minister and marked in a manner specified by the Minister in or in relation to that approval;
(b) where the safety-lamp is of a type the approval for which contains provisions relating to the characteristics of any bulb to be used therein, in conformity with those provisions.

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Source: https://www.legislation.gov.uk/uksi/1956/1765/schedule/FIRST/paragraph/4 (the official version)
Page: https://openlegislation.uk/coal-and-other-mines-safety-lamps-and-lighting-order-1956/schedule-FIRST/paragraph-4
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.