Changes made by 91/479/EEC: Commission Decision of 29 July 1991 concerning animal health conditions and veterinary certification for the importation of bovine semen from the United States of America
EU Decision 1991/479
No changes made by 91/479/EEC: Commission Decision of 29 July 1991 concerning animal health conditions and veterinary certification for the importation of bovine semen from the United States of America are recorded.
From legislation.gov.uk's record of changes, the official one: see it there.