# The Measuring Instruments Regulations 2016, Paragraph 19


No person may use for trade an automatic catchweigher other than catchweigher of accuracy class Y(I) or Y(II) in any transaction—
(a) in, or in articles made from gold silver or other precious metals, including gold or silver thread or fringe; or
(b) in precious stones or pearls.

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Source: https://www.legislation.gov.uk/uksi/2016/1153/schedule/6/paragraph/19 (the official version)
Page: https://openlegislation.uk/measuring-instruments-regulations-2016/schedule-6/paragraph-19
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.