Changes to 2004/320/EC: Commission Decision of 31 March 2004 amending Decisions 93/52/EEC, 2001/618/EC and 2003/467/EC as regards the status of acceding countries with regard to brucellosis (B. melitensis), Aujeszky's disease, enzootic bovine leukosis, bovine brucellosis and tuberculosis and of France with regard to Aujeszky's disease (notified under document number C(2004) 1094)
EU Decision 2004/320
The legislation that changes 2004/320/EC: Commission Decision of 31 March 2004 amending Decisions 93/52/EEC, 2001/618/EC and 2003/467/EC as regards the status of acceding countries with regard to brucellosis (B. melitensis), Aujeszky's disease, enzootic bovine leukosis, bovine brucellosis and tuberculosis and of France with regard to Aujeszky's disease (notified under document number C(2004) 1094), newest first. Choose one to see each change.
From legislation.gov.uk's record of changes, the official one: see it there.