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
Premiership of Margaret Thatcher second ballot to Heseltine. On 22 November, at just after 9.30 am, she announced to the Cabinet that she would not be a candidate in the second ballot after all. Shortly afterwards, her staff made public what was, in effect, her resignation statement, in which she stated that she had "concluded that the unity of the Party and the prospects of victory in a General Election would be better served" if she stood down as Prime Minister. Neil Kinnock, Leader of the Opposition, proposed a motion of no confidence in the Government, and Margaret Thatcher seized the opportunity this presented