# Fire Certificates (Special Premises) Regulations (Northern Ireland) 1991, Paragraph 12


Any premises containing any machine or apparatus in which charged particles can be accelerated by the equivalent of a voltage of not less than 50 megavolts except where the premises are used as a hospital.

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Source: https://www.legislation.gov.uk/nisr/1991/446/schedule/1/paragraph/12 (the official version)
Page: https://openlegislation.uk/fire-certificates-special-premises-regulations-northern-ireland-1991/schedule-1/paragraph-12
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.