"The country that holds the presidency must be an impartial seeker of compromises between all member states," Nestor said according to a Riigikogu press release. "The issues faced by the EU today are rather complicated, and it is not always possible to find a solution to them during the six-month presidency period. This is why successive presidencies must cooperate closely, in order to complete what has been started."

The joint declaration by Estonia, Bulgaria and Austria emphasizes the need to address the issues of security and economy as well as the exit negotiations of the U.K. and solving the migration crisis.

The goal of the joint program of the three successive presidencies, known as the trio countries, is to ensure effective political and departmental level coordination and communication between the parliaments of the three countries and the European Parliament in preparing the parliamentary programs and the organization of conferences during the presidency period. This helps ensure that important issues are in the focus not only during one presidency, but throughout the entire year and a half-long period.

The declaration will be signed at the Conference of Speakers of the EU Parliaments in Bratislava on Monday, where the future of Europe and the relations of national parliament with citizens will be discussed.

Estonia will take over the presidency of the Council of the EU from Malta in July; Bulgaria will head the presidency from January to June of next year, followed by Austria during the second half of 2018.