Council Decision (EU) 2016/581 of 11 April 2016 on the signing, on behalf of the European Union, of the Agreement in the form of an Exchange of Letters between the European Union and the Eastern Republic of Uruguay pursuant to Article XXIV:6 and Article XXVIII of the General Agreement on Tariffs and Trade (GATT) 1994 relating to the modification of concessions in the schedule of the Republic of Croatia in the course of its accession to the European Union