Changes made by 79/277/EEC: Commission Decision of 21 February 1979 derogating from Decisions 78/693/EEC, 78/694/EEC, 78/695/EEC and 79/238/EEC concerning animal health conditions and veterinary certification for imports of fresh meat from Argentina, Brazil, Uruguay and Paraguay
EU Decision 1979/277
No changes made by 79/277/EEC: Commission Decision of 21 February 1979 derogating from Decisions 78/693/EEC, 78/694/EEC, 78/695/EEC and 79/238/EEC concerning animal health conditions and veterinary certification for imports of fresh meat from Argentina, Brazil, Uruguay and Paraguay are recorded.
From legislation.gov.uk's record of changes, the official one: see it there.