Wilfried Martens prime minister, described him as a "true statesman and one of the fathers of federal Belgium". Martin Schulz, president of the European Parliament, paid tribute to him as a "statesman of Belgium, Europe and an outstanding leader of European Parliament". Jerzy Buzek, EPP MEP and former prime minister of Poland, described him as "irreplaceable". The EPP think tank Centre for European Studies has been renamed after him, now being the "Wilfried Martens Centre for European Studies", a decision taken during the EPP Congress in Dublin held on 9 March 2014. He received an Official State funeral, which was attended by
Prime minister leader, the incoming leader will usually be referred as "prime minister-in-waiting". An example or this situation was in 2016 in the United Kingdom when Theresa May was elected leader of the Conservative Party while David Cameron was still prime minister. Ukraine's constitution (1996) lists the powers, functions and duties of the Prime Minister of Ukraine. Most prime ministers in parliamentary systems are not appointed for a specific term in office and in effect may remain in power through a number of elections and parliaments. For example, Margaret Thatcher was only ever appointed prime minister on "one" occasion, in 1979. She