# Fire Certificates (Special Premises) Regulations (Northern Ireland) 1991, Paragraph 9


Any premises at which there are in process, manufacture, use or storage at any one time, or there are facilities provided for such processing, manufacture, use or storage of, quantities of any of the materials listed below in, or in excess of, the quantities specified—
Phosgene
5 tonnes
Ethylene oxide
20 tonnes
Carbon disulphide
50 tonnes
Acrylonitrile
50 tonnes
Hydrogen cyanide
50 tonnes
Ethylene
100 tonnes
Propylene
100 tonnes
Any highly flammable liquid not otherwise specified
4,000 tonnes

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Source: https://www.legislation.gov.uk/nisr/1991/446/schedule/1/paragraph/9 (the official version)
Page: https://openlegislation.uk/fire-certificates-special-premises-regulations-northern-ireland-1991/schedule-1/paragraph-9
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.