Changes to 83/300/EEC: Commission Decision of 8 June 1983 amending Decision 83/138/EEC concerning certain health protection measures against African swine fever
EU Decision 1983/300
No changes to 83/300/EEC: Commission Decision of 8 June 1983 amending Decision 83/138/EEC concerning certain health protection measures against African swine fever are recorded.
From legislation.gov.uk's record of changes, the official one: see it there.