Changes made by 91/449/EEC: Commission Decision of 26 July 1991 laying down the specimen animal health certificates in respect of meat products imported from third countries
EU Decision 1991/449
No changes made by 91/449/EEC: Commission Decision of 26 July 1991 laying down the specimen animal health certificates in respect of meat products imported from third countries are recorded.
From legislation.gov.uk's record of changes, the official one: see it there.