Changes made by 2003/173/EC: Commission Decision of 12 March 2003 concerning protective measures in relation to a strong suspicion of avian influenza in Belgium (notified under document number C(2003) 828)
EU Decision 2003/173
No changes made by 2003/173/EC: Commission Decision of 12 March 2003 concerning protective measures in relation to a strong suspicion of avian influenza in Belgium (notified under document number C(2003) 828) are recorded.
From legislation.gov.uk's record of changes, the official one: see it there.