# The Reporting of Injuries, Diseases and Dangerous Occurrences Regulations 2013, Paragraph 37


The stoppage of any ventilating apparatus (other than an auxiliary fan) for over 30 minutes, except for planned maintenance, which causes a reduction in mine ventilation resulting in dangerous levels of noxious or flammable gases.

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Source: https://www.legislation.gov.uk/uksi/2013/1471/schedule/2/paragraph/37 (the official version)
Page: https://openlegislation.uk/reporting-of-injuries-diseases-and-dangerous-occurrences-regulations-2013/schedule-2/paragraph-37
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.