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
Deputy prime minister former Minister of Finance of Russia, Alexey Kudrin also serves as one of the deputies of the prime ministers or "vice-premiers". One or two of these deputy prime ministers may hold the title of a "First Deputy Prime Minister". The Russian federal law indicates that in accordance with the order established in advance, "one of the deputy prime ministers" may temporarily substitute for the Prime Minister in his or her absence. Customarily, however, it is to one of the "First" Deputy Prime Ministers that the prime-ministerial duties may be delegated. At the same time, in the case of Prime Minister's