Changes to 91/369/EEC: Commission Decision of 17 July 1991 on the suspension of the buying-in of butter in certain Member States (Only the English, French and Dutch texts are authentic)
EU Decision 1991/369
No changes to 91/369/EEC: Commission Decision of 17 July 1991 on the suspension of the buying-in of butter in certain Member States (Only the English, French and Dutch texts are authentic) are recorded.
From legislation.gov.uk's record of changes, the official one: see it there.