# The Stratified Ironstone, Shale and Fireclay Mines (Explosives) Regulations 1956, Regulation 44: Issue and use of detonators


No person shall issue for use in, and no person shall take into or use in, part of a mine to which this Part of these regulations applies—
(a) (except in the case of a mine of fireclay) any detonator other than an electric detonator with a copper tube;
(b) any delay detonator having a period of delay exceeding five seconds.

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Source: https://www.legislation.gov.uk/uksi/1956/1943/regulation/44 (the official version)
Page: https://openlegislation.uk/stratified-ironstone-shale-and-fireclay-mines-explosives-regulations-1956/regulation-44
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.