x     Uruguay this week filled 63% of the annual zero-tariff rice quota granted by the European Union to Mercosur, in the first significant trade milestone since the provisional entry into force, on 1 May, of the association agreement between the two blocs. The total quota of 6,667 tons for the current year was covered within a few weeks of activity, according to Acting Foreign Minister Valeria Csukasi, in what amounts to one of the first operational tests of the treaty signed on 17 January in