Changes made by Decision No 582/2008/EC of the European Parliament and of the Council of 17 June 2008 introducing a simplified regime for the control of persons at the external borders based on the unilateral recognition by Bulgaria, Cyprus and Romania of certain documents as equivalent to their national visas for the purposes of transit through their territories
EU Decision 2008/582
No changes made by Decision No 582/2008/EC of the European Parliament and of the Council of 17 June 2008 introducing a simplified regime for the control of persons at the external borders based on the unilateral recognition by Bulgaria, Cyprus and Romania of certain documents as equivalent to their national visas for the purposes of transit through their territories are recorded.
From legislation.gov.uk's record of changes, the official one: see it there.