Prime minister Bahrain's prime minister, Sheikh Khalifah bin Sulman Al Khalifah has been in the post since 1970, making him the longest serving non-elected prime minister. The post of prime minister may be encountered both in constitutional monarchies (such as Belgium, Denmark, Japan, Luxembourg, the Netherlands, Norway, Malaysia, Morocco, Spain, Sweden, Thailand, Canada, Australia, New Zealand, and the United Kingdom), and in parliamentary republics in which the head of state is an elected official (such as Finland, the Czech Republic, France, Greece, Hungary, India, Indonesia (1945-1959), Ireland, Pakistan, Portugal, Montenegro, Croatia, Bulgaria, Romania, Serbia and Turkey (1923-2018)). See also "First Minister", "Premier",
Prime Minister of Cambodia ministers were elected including Sisowath Youtevong, Norodom Sihanouk, and Lon Nol. In 1993, constitutional monarchy was restored in Cambodia. The role of the prime minister was officially recognized in the constitution. Norodom Ranariddh became the first democratically elected prime minister. The prime minister is required to be a member of parliament. He first needs to be elected by a majority of parliament before a swearing-in ceremony can take place. The inauguration of the prime minister takes place at the Royal Palace. The prime minister-designate takes an oath of office in front of the monarch and the two heads of the