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 94/839/EC: Commission Decision of 19 December 1994 amending Commission Decision 91/449/EEC laying down the specimen animal health certificates in respect of meat products imported from third countries
From legislation.gov.uk's record of changes, the official one: see it there.