The President doesn't call the session, that's what they say from his cabinet.

Less than 10 days after the CEC's election outcome was certified, Kosovo Republic President Hashim Thaci has not been ready to set the date for holding the Kosovo Assembly's constitutional session. Reasoning the president's delay in calling the constitutional session, political adviser to President Thaci, Ardian Arifaj, estimates he has passed [...]
Reasoning the president's delay in calling for the constitutional session, political adviser to President Thaci, Ardian Arifaj, estimates it has been a short time since they have made the admission of the certificate of the results of the June 11th early elections by the CEC.
“Still no decision on calling the constitutional session. But there is no procrastination, as by July 10th the certificate of election results to the president has arrived”, he told “Gazeta Blic”
Asked whether President Thaci is awaiting any warning from the coalition P DK-AAK-NISMA for calling the constitutional session, Arifaj denied this, saying they are within the legal deadline.
“We're not waiting for a signal, we're within the right legal limits.”, said this president's adviser.
Meanwhile, asked whether there is any decision on the part of President Thaci during the coming week regarding the constitutional session, Arifaj refused to give details denying there is accurate information.
“Don't speculate... But on the other hand, this is not a matter that shouldn't be made public, I assure you, when the decision is made we will make public”, he said over the phone.
Otherwise, July 8th The CEC certified the results of the June 11th elections. While, the president has a legal deadline until August 8th to call the Convention Constituent session.
Formation of Institutions
Under the Constitution, the Kosovo Assembly is elected by a four-year term, starting on the day of the constitutional hearing, held within thirty days of the official announcement of election results.
After the constitution, the Government's selection procedure begins. On the basis of the political agreement, it is expected that the winning party or coalition will propose the mandate for forming the Kosovo government.
Later, the president of the Republic proposes to the Parliament the candidate for prime minister, in consultation with the political party or the coalition that has won the necessary majority in the Assembly to form Government.
The candidate for prime minister, not later than 15 days after the appointment, represents the composition of the government before the Kosovo Assembly and requires approval by the Parliament.
The government is considered elected if it receives the majority of votes of all Kosovo Assembly deputies (61 votes).
If the proposed composition of the Government does not receive the most necessary votes, the president of the Republic of Kosovo, within ten (10) days, appoints the other candidate under the same procedure.
If the government is not elected the second time, then Kosovo's president announces the elections, which should be held no later than 40 (40) days from the day of their proclamation.












