Changes to 81/315/EEC: Commission Decision of 24 April 1981 on health protection measures in respect of certain regions of Bulgaria
EU Decision 1981/315
Made by 88/385/EEC: Commission Decision of 10 June 1988 amending Decision 81/315/EEC on health protection measures in respect of certain regions of Bulgaria
From legislation.gov.uk's record of changes, the official one: see it there.