Changes to 79/70/EEC: Commission Decision of 20 December 1978 amending for the second time Decision 78/360/EEC authorizing certain Member States to sell butter at a reduced price in the form of concentrated butter (Only the English text is authentic)
EU Decision 1979/70
No changes to 79/70/EEC: Commission Decision of 20 December 1978 amending for the second time Decision 78/360/EEC authorizing certain Member States to sell butter at a reduced price in the form of concentrated butter (Only the English text is authentic) are recorded.
From legislation.gov.uk's record of changes, the official one: see it there.