are regarded as having unbearable mental or physical impairment. This 'order' of retirement by President of South Korea due to impairment of Supreme Court Justice () is clearly stipulated in article 106(2) of the Constitution and article 47 of the Act. Other lower ordinary court Judges can also be ordered to retire due to impairment by Supreme Court Chief Justice. This is retirement order system is one of major difference between Supreme Court Justice and Constitutional Court Justice; the latter cannot be ordered to retire because of impairment, as there are no statute supporting such retirement order system in the Constitutional Court Act. Current justices Organization Research judges Judges in Research division of the Supreme Court (, formerly known as 'Research Judges' or 'Judicial Researchers') are officials supporting Supreme Court Justices. By article 24(3) of the Act, there are two types of Research Judges; One is originally lower ordinary court Judges seconded to the Supreme Court by order of Chief Justice, another is experts who are not lower ordinary court Judges. The latter is called 'Judicial Researchers' and appointed for maximum term of 3 years, while former is called 'Research Judges' and usually seconded to work in the Supreme Court for 1 to 2 years. This system is influenced by German 'Research Associates' () who are originally lower court judges seconded to federal courts up to five years, working as judicial assistant for judges in highest courts. Though working term for these research staffs are short, they are core staffs who operates whole procedure of the Court, since there are too many of cases appealed to the Court. The number of Research Judges are currently around 100, while number of Judicial Researchers are around 30. National Court Administration Established as apparatus of the Supreme Court under article 67 of the Court Organization Act, the 'National Court Administration' (NCA, ) manages all of matters on administration of all ordinary courts (including the Supreme Court itself) in South Korea. The head of the NCA is called 'Minister of NCA' () and solely appointed by the Chief Justice among associate Supreme Court Justices. As other Supreme Court Justices, the Minister is treated as same level as other Ministers at State Council in executive branch of South Korean government. Also the Vice Minister of NCA is appointed by the Chief Justice usually from senior lower court Judges and treated as same level as other