# The Coal and Other Mines (Locomotives) Order 1956, Paragraph 12


Determinations of the firedamp content shall be made—
(a) by means of apparatus of a type approved for the purpose by the Minister, by a competent person appointed for that purpose by the manager of the mine; or
(b) by means of samples of air taken by a competent person so appointed and analysed within four days. (without taking into account any Saturday, Sunday or day of general holiday) of the taking thereof.

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Source: https://www.legislation.gov.uk/uksi/1956/1771/schedule/FIRST/paragraph/12 (the official version)
Page: https://openlegislation.uk/coal-and-other-mines-locomotives-order-1956/schedule-FIRST/paragraph-12
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.