http://www.legislation.gov.uk/ukpga/1985/72/schedule/3/part/II/crossheading/metric-system/1994-07-31Weights and Measures Act 1985An Act to consolidate certain enactments relating to weights and measures.1985-10-30texttext/xmlenStatute Law Database2024-05-171994-07-31 SCHEDULESSCHEDULE 3 Measures and Weights Lawful for Use for TradePart II Square Measures Metric system2. Measures of, or any multiple of, 1 square decimetre.