Besides, the president of the European Central Bank is also invited to share with national leaders his observations on the EU and euro area economies.
EU leaders meeting Thursday in Brussels are widely expected to reappoint Tusk - a former Polish premier - as head of the European Council despite sharp exchanges with Warsaw, which claims he has interfered in domestic politics and acted as a German stooge.
The Polish government has decided "to veto" the conclusions of the council after 27 leaders of the European Union re-elected Donald Tusk for a second term as president of the European Council.
At the summit of EU leaders in Malta in February, Tusk, who assumed office in December 2014, voiced his intention to continue his work as the European Council head.
But despite the row diplomats confidently predicted a second term for Mr Tusk who was backed by the majority of European Union leaders.
After being confirmed as president again, he tweeted: "Grateful for trust & positive assessment by #EUCO (European Council). At the same time, we also need to avoid the creation of new barriers, both in Europe and on the global stage", Tusk said. But other leaders insist there is little appetite for a delay.
Poland's nationalist government has proposed little-known Polish EU lawmaker Jacek Saryusz-Wolski to replace Tusk, whose current term ends May 31.
The hostilities between Kaczynski and Tusk are said ot be personal, as Kaczynski holds Tusk "morally responsible" for his twin brothers death in a 2010 plane crash over Russian Federation.
Dutch prime minister Mark Rutte told press on Thursday evening that there were different legal formats by which the member states could formally confirm the decisions taken. "There are very clear rules of engagement and rules of procedure that we will follow", Muscat said.
Tusk, who was once Polish prime minister and who comes from the party Civic Platform, which is the opposition to the ruling Law and Justice Party, was staunchly opposed by Warsaw.