# Weights and Measures (Northern Ireland) Order 1981, Paragraph 2


No person shall use the carat (metric) for trade except for the purposes of transactions in precious stones or pearls.

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Source: https://www.legislation.gov.uk/nisi/1981/231/schedule/2/paragraph/2 (the official version)
Page: https://openlegislation.uk/weights-and-measures-northern-ireland-order-1981/schedule-2/paragraph-2
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.