# The Coal Mines (Cardox and Hydrox) Regulations 1956, Regulation 4


(1) The manager of every mine at which shells are filled or primed shall appoint such number of competent persons and make such arrangements as to secure that no shell is filled or primed thereat except by or under the supervision of such a person.
(2) No shell filled or primed otherwise than at the mine shall be taken below ground at any mine other than a shell filled or primed in pursuance of arrangements approved by an inspector by notice served on the manager of the mine.

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Source: https://www.legislation.gov.uk/uksi/1956/1942/regulation/4 (the official version)
Page: https://openlegislation.uk/coal-mines-cardox-and-hydrox-regulations-1956/regulation-4
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.