# The Democratic People's Republic of Korea (Sanctions) (EU Exit) Regulations 2019, Paragraph 10

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

(1) Laser mirrors, other than those specified in Dual-Use code 6A005.e., consisting of substrates having a thermal expansion coefficient of 10-6 K-1 or less at 20 ℃ (e.g. fused silica or sapphire).
(2) Sub-paragraph (1) does not include optical systems specially designed for astronomical applications, except if the mirrors contain fused silica.

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Source: https://www.legislation.gov.uk/uksi/2019/411/schedule/2/paragraph/10 (the official version)
Page: https://openlegislation.uk/democratic-peoples-republic-of-korea-sanctions-eu-exit-regulations-2019/schedule-2/paragraph-10
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.