Changes made by 1999/789/EC: Commission Decision of 3 December 1999 concerning certain protection measures relating to African swine fever in Portugal (notified under document number C(1999) 4224)
EU Decision 1999/789
No changes made by 1999/789/EC: Commission Decision of 3 December 1999 concerning certain protection measures relating to African swine fever in Portugal (notified under document number C(1999) 4224) are recorded.
From legislation.gov.uk's record of changes, the official one: see it there.