Changes made by 90/231/EEC: Commission Decision of 7 May 1990 concerning certain protection measures relating to classical swine fever in the Federal Republic of Germany
EU Decision 1990/231
No changes made by 90/231/EEC: Commission Decision of 7 May 1990 concerning certain protection measures relating to classical swine fever in the Federal Republic of Germany are recorded.
From legislation.gov.uk's record of changes, the official one: see it there.