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 Cuba referred to as being the country's "prime minister". The incumbent since 19 April 2018 has been Miguel Díaz-Canel, who took over from Raúl Castro on that date. Prime Minister of Cuba The Prime Minister of Cuba () – official title: President of the Council of Ministers () – is the head of the Council of Ministers of Cuba. The office of Prime Minister was first instituted in 1940 in accordance with the provisions of the Constitution of Cuba as amended in that year. The first Prime Minister of Cuba was Carlos Saladrigas Zayas (1900–1957), the nephew of former President Alfredo