Question: Who picks the prime minister in the country of citizenship of the prime minister who was appointed only once?

<P0-S0> The Financial Services Act 1986 (1986 c.60) was an Act of the Parliament of the United Kingdom passed by the government of Margaret Thatcher to regulate the financial services industry. <P0-S1> The Act used a mixture of governmental regulation and self-regulation, and created a Securities and Investments Board (SIB) presiding over various new self-regulating organisations (SROs). <P0-S2> It was superseded by the Financial Services and Markets Act 2000. <SEP> <P1-S0> 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. <P1-S1> For example, Margaret Thatcher was only ever appointed prime minister on one occasion, in 1979. <P1-S2> She remained continuously in power until 1990, though she used the assembly of each House of Commons after a general election to reshuffle her cabinet. <SEP> <P2-S0> Prime Minister of the United Kingdom of Great Britain and Northern Ireland Royal Arms used by Her Majesty's Government Incumbent Theresa May since 13 July 2016 (2016 - 07 - 13) Government of the United Kingdom Office of the Prime Minister Style Prime Minister (informal) The Right Honourable (within the UK and the Commonwealth) His / Her Excellency (in international correspondence) Member of Cabinet Privy Council European Council British -- Irish Council Reports to Parliament Residence 10 Downing Street Chequers Seat Westminster Appointer Monarch of the United Kingdom Term length At Her Majesty's pleasure Inaugural holder Sir Robert Walpole as First Lord of the Treasury and de facto first Prime Minister. <P2-S1> Formation 4 April 1721 Salary £151,451 annual, including £76,011 MP's salary Website Official website <SEP> <P3-S0> the canadian prime minister serves at her majesty's pleasure, meaning the post does not have a fixed term. <P3-S1> once appointed and sworn in by the governor general, the prime minister remains in office until he or she resigns, is dismissed, or dies. <P3-S2> the lifespan of parliament was limited by the constitution to five years and, though the governor general may still, on the advice of the prime minister, dissolve parliament and issue the writs of election prior to the date mandated by the canada elections act; the king -- byng affair was the only time since confederation that the governor general deemed it necessary to refuse his prime minister's request for a general vote. <P3-S3> as of 2007, with an amendment to the elections act, section 56.1 (2) was changed to limit the term of a majority government to four years, with election day being set as the third monday in october of the fourth calendar year after the previous polling date. <SEP> <P4-S0> the prime minister of the bahamas is the head of government of the bahamas, currently hubert minnis. <P4-S1> minnis, as leader of the governing free national movement party (fnm), he was sworn in as prime minister on 11 may 2017, succeeding progressive liberal party (plp) leader perry christie. <P4-S2> this was a result of the fnm's victory in the bahamas general election of may 10, 2017. the prime minister is formally appointed into office by the governor general of the bahamas, who represents elizabeth ii, the queen of the bahamas (the bahamian head of state).