Bronisław Geremek Constitutional Committee from 1989 to 1991 and its European Law Committee from 2000 to 2001. After a coalition government was formed in October 1997 by the Solidarity Electoral Action (AWS) and the Freedom Union Geremek served as Minister of Foreign Affairs under Prime Minister Jerzy Buzek until 2000. In 1998 Poland chaired OSCE, and Bronisław Geremek served as Chairperson-in-Office. In March 1999 he signed the treaty under which Poland joined NATO. In the election to the European Parliament in June 2004 Geremek was elected as a candidate of the Freedom Union, winning the largest number of votes in Warsaw. In
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