# The Syria (Sanctions) (EU Exit) Regulations 2019, Paragraph 13

Extent: E+W+S+N.I.

(1) Conventional or turbulent air-flow clean-air rooms and self-contained fan-HEPA or ULPA filter units that may be used for containment facilities at P3 or P4 (BSL 3, BSL 4, L3, L4) containment levels.
(2) For the purpose of sub-paragraph (1), “P3 or P4 (BL3, BL4, L3, L4) containment levels” are the levels specified in the World Health Organisation Laboratory Biosafety manual .

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Source: https://www.legislation.gov.uk/uksi/2019/792/schedule/3/paragraph/13 (the official version)
Page: https://openlegislation.uk/syria-sanctions-eu-exit-regulations-2019/schedule-3/paragraph-13
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.