The agreement also paves the way for EU membership and raises hopes for a virtuous circle for the entire region. Finally, it is a very positive success for European diplomacy, embodied by Catherine Ashton, EU High Representative for Foreign Affairs and Security Policy. The Brussels Agreement (Serbian: Бриселски споразум / Briselski sporazum, Albanian: Marrëveshja e Brukselit), formally the first agreement in principle for the normalization of relations, was concluded between the governments of Serbia and Kosovo[a] on the normalization of their relations.  It was negotiated and concluded in Brussels under the auspices of the European Union, although it was not signed by either party. The negotiations were led by Serbian Prime Minister Ivica Dacic and Kosovar Prime Minister Hashim Thaçi, as well as EU High Representative Catherine Ashton. The agreement was concluded on 19 September 2011. On 12th October 2011 the European Commission issued a favourable opinion on Croatia`s accession to the European Union. As a result, on 1 December 2011, the European Parliament voted in favour of Croatia`s application for membership of the European Union. Parliament voted in favour by 564 votes in favour, 38 against and 32 abstentions. The Serbian National Assembly did not treat the agreement as international and did not ratify it in a binding law, which is a necessary procedure for international agreements in Serbia.
 However, it only accepted the government report on the « process of political and technical dialogue that has taken place so far with the temporary institutions in Pristina, through the EU, including the process of implementing the agreements reached ».  The Constitutional Court in Belgrade did not answer the question of the constitutionality of the agreement and declared in December 2014 that the issue raised was a political issue and not a legal one. . . .