Changes made by 1999/86/EC: Council Decision of 18 May 1998 on the conclusion of a Protocol adjusting trade aspects of the Europe Agreement establishing an association between the European Communities and their Member States, of the one part, and the Republic of Estonia, of the other part, to take account of the accession of the Republic of Austria, the Republic of Finland and the Kingdom of Sweden to the European Union and the outcome of the Uruguay Round negotiations on agriculture, including improvements to the existing preferential arrangements
EU Decision 1999/86
No changes made by 1999/86/EC: Council Decision of 18 May 1998 on the conclusion of a Protocol adjusting trade aspects of the Europe Agreement establishing an association between the European Communities and their Member States, of the one part, and the Republic of Estonia, of the other part, to take account of the accession of the Republic of Austria, the Republic of Finland and the Kingdom of Sweden to the European Union and the outcome of the Uruguay Round negotiations on agriculture, including improvements to the existing preferential arrangements are recorded.
From legislation.gov.uk's record of changes, the official one: see it there.