Changes to Council Directive 76/764/EEC of 27 July 1976 on the approximation of the laws of the Member States on clinical mercury-in-glass, maximum reading thermometers
EU Directive 1976/764
Made by Council Directive 83/128/EEC of 28 March 1983 amending Directive 76/764/EEC on the approximation of the laws of the Member States on clinical mercury-in-glass, maximum- reading thermometers
From legislation.gov.uk's record of changes, the official one: see it there.