Changes made by 89/578/EEC: Council Decision of 30 October 1989 amending for the third time Decision 88/303/EEC recognizing certain parts of the territory of the Community as being either officially swine fever free or swine fever free
EU Decision 1989/578
Made to 88/303/EEC: Council Decision of 24 May 1988 recognizing certain parts of the territory of the Community as being either officially swine fever free or swine fever free
From legislation.gov.uk's record of changes, the official one: see it there.