http://www.legislation.gov.uk/nisi/1981/231/schedule/1/part/II/chapterWeights and Measures (Northern Ireland) Order 1981texttext/xmlenStatute Law Database2024-05-15Expert Participation2017-01-11Weights and Measures (Northern Ireland) Order 1981The Weights and Measures (Northern Ireland) Order 1981art. 22A(2)(b)(ba)The Food (Amendment) (EU Exit) Regulations 2019reg. 2(2)(a)reg. 1SCHEDULESSCHEDULE 1MEASURES AND WEIGHTS LAWFUL FOR USE FOR TRADEPART IISQUARE MEASURESMetric system2Measures of, or of any multiple of, 1 square decimetre.