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
Prime Minister of New Zealand of the few countries in the world to have had three female heads of government, and one of only three countries to have had a female head of government directly succeed another. The first female prime minister was Jenny Shipley of the National Party, who replaced Jim Bolger in late 1997; Shipley was succeeded by Helen Clark in 1999. Jacinda Ardern, the second female leader of the Labour Party after Clark, became prime minister in 2017. On becoming the Colony of New Zealand in 1841, New Zealand was directly governed by a governor, appointed by the Colonial Office in Britain.