Miroslav Lajčak, EU Envoy for Serbia and Kosovo Dialogue explained to Euronews Serbia "Our preference, as the EU facilitator, was to have the document signed. And this was our proposal to the parties. (Yet) President Vucic made it quite clear that he was not in a position to sign this document. He was citing constitutional limitations. We made several proposals on how to address this issue, but they were refused."
According to international law experts (and Article 3 of the Vienna Convention on Contract Law), oral agreements can be valid and binding. Serbian president clarifies his position.
Aleksandar Vučić, President of Serbia said, "For Serbia, it is legally binding when I put a signature or stamp on something, or when I verbally agree to it. And no one else can produce a legal consequence for the Republic of Serbia, except for its president and, in some cases, the prime minister and the minister of foreign affairs"