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
Vice Prime Minister of Mauritius Minister, the National Assembly voted against the bill but provided with an understanding that two cabinet ministers who are senior members just behind the Deputy Prime Minister shall be officially known as Vice-Prime Minister but no office was created, making the position essentially an honorific title. Therefore, in case of absence, illness or sudden death of the Prime Minister, it is only the Deputy Prime Minister who can become the Acting Prime Minister until the Prime Minister resumes office or another is appointed. Vice Prime Minister of Mauritius Vice-Prime Minister of Mauritius () is an honorary title usually carried by