Changes to 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
Made by 94/453/EC: Commission Decision of 29 June 1994 amending or repealing some detailed rules concerning the animal health and public health conditions required for imports of certain live animals and animal products from Austria, Finland, Norway and Sweden in application of the European Economic Area Agreement
From legislation.gov.uk's record of changes, the official one: see it there.