Changes made by 98/507/EC: Commission Decision of 28 July 1998 amending Decision 97/408/EC on protective measures in relation to classical swine fever in the Czech Republic (notified under document number C(1998) 2276)
EU Decision 1998/507
Made to 97/408/EC: Commission Decision of 25 June 1997 on protective measures in relation to classical swine fever in the Czech Republic
From legislation.gov.uk's record of changes, the official one: see it there.