# The Coal Mines (Precautions against Inflammable Dust) Order 1956, Paragraph 3


Where any road is used in connection with the working of coal from more than one seam the volatile matter content of the coal shall be deemed to exceed thirty-five per cent. unless such a determination has been made in respect of each seam and in the excepted case shall be deemed to be the highest percentage so determined.

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Source: https://www.legislation.gov.uk/uksi/1956/1769/schedule/n2/paragraph/3 (the official version)
Page: https://openlegislation.uk/coal-mines-precautions-against-inflammable-dust-order-1956/schedule-n2/paragraph-3
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.