Changes made by 98/658/EC: Council Decision of 24 September 1998 on the conclusion of the Additional Protocol to the Interim Agreement on trade and trade-related matters between the European Community, the European Coal and Steel Community and the European Atomic Energy Community, of the one part, and the Republic of Slovenia, of the other part, and to the Europe Agreement between the European Communities and their Member States, of the one part, and the Republic of Slovenia, of the other part
EU Decision 1998/658
No changes made by 98/658/EC: Council Decision of 24 September 1998 on the conclusion of the Additional Protocol to the Interim Agreement on trade and trade-related matters between the European Community, the European Coal and Steel Community and the European Atomic Energy Community, of the one part, and the Republic of Slovenia, of the other part, and to the Europe Agreement between the European Communities and their Member States, of the one part, and the Republic of Slovenia, of the other part are recorded.
From legislation.gov.uk's record of changes, the official one: see it there.