COUNCIL REGULATION (EC) No 1839/2006 of 28 November 2006 concerning the implementation of the Agreement in the form of an Exchange of Letters between the European Community and the Argentine Republic pursuant to Article XXIV:6 of GATT 1994, amending and supplementing Annex I to Regulation (EEC) No 2658/87 on the tariff and statistical nomenclature and on the Common Customs Tariff