Changes made by 91/522/EEC: Council Decision of 24 September 1991 amending Commission Decision 87/257/EEC as regards the list of establishments in the United States of America approved for the purpose of importing fresh meat into the Community
EU Decision 1991/522
No changes made by 91/522/EEC: Council Decision of 24 September 1991 amending Commission Decision 87/257/EEC as regards the list of establishments in the United States of America approved for the purpose of importing fresh meat into the Community are recorded.
From legislation.gov.uk's record of changes, the official one: see it there.