Changes made by Council Directive of 26 July 1971 on the approximation of the laws of the Member States relating to 5 to 50 kilogramme medium accuracy rectangular bar weights and 1 to 10 kilogramme medium accuracy cylindrical weights (71/317/EEC)
EU Directive 1971/317
No changes made by Council Directive of 26 July 1971 on the approximation of the laws of the Member States relating to 5 to 50 kilogramme medium accuracy rectangular bar weights and 1 to 10 kilogramme medium accuracy cylindrical weights (71/317/EEC) are recorded.
From legislation.gov.uk's record of changes, the official one: see it there.