Changes to Council Directive 79/112/EEC of 18 December 1978 on the approximation of the laws of the Member States relating to the labelling, presentation and advertising of foodstuffs for sale to the ultimate consumer
EU Directive 1979/112
Made by Commission Directive 91/72/EEC of 16 January 1991 amending Council Directive 79/112/EEC in respect of the designation of flavourings in the list of ingredients on the labels of foodstuffs
From legislation.gov.uk's record of changes, the official one: see it there.