Changes made by 91/549/EEC: Commission Decision of 20 September 1991 concerning animal health conditions and veterinary certification for the importation of bovine semen from Canada
EU Decision 1991/549
No changes made by 91/549/EEC: Commission Decision of 20 September 1991 concerning animal health conditions and veterinary certification for the importation of bovine semen from Canada are recorded.
From legislation.gov.uk's record of changes, the official one: see it there.