Who is the current Chief Justice?
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The Chief Justice is chosen by secret ballot by the Justices to serve a 4-year term. The current Chief Justice is Mary Fairhurst who was elected by her peers on November 3, 2016. Chief Justice Mary Fairhurst was sworn in on January 9, 2017, and succeeds Barbara Madsen, one of the longest-serving Chief Justices in Washington state history. 
Prior to January 1997 (pursuant to a Constitutional amendment adopted in 1995) the post of Chief Justice was held for a 2-year term by a justice who (i) was one of the Justices with 2 years left in their term, (ii) was the most senior in years of service of that cohort, and (iii) (generally) had not previously served as Chief Justice. The last Chief Justice under the rotation system, Barbara Durham was the architect of the present internal election system, and was the first to be elected under the new procedure, serving until her resignation in 1999.
Washington Supreme Court
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The current Chief Justice is Richard Wagner, who took office on December 18, 2017, replacing Beverley McLachlin, the first woman to hold this position. Born in Montreal on April 2, 1957, he had been a puisne Supreme Court justice for at the time of his elevation to chief justice. He previously sat on the Quebec Court of Appeal.
Chief Justice of Canada
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John D. Minton Jr. (born March 19, 1952 in Fort Lauderdale, Florida) is the current Chief Justice of the Kentucky Supreme Court. Minton was elected to the Supreme Court on July 24, 2006 to fill a vacancy created by Justice William S. Cooper, who retired on June 30, 2006. On the retirement of Chief Justice Joseph E. Lambert, Minton was elected by his fellow justices to replace him. He was sworn in as Chief Justice on June 27, 2008.
John D. Minton Jr.
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The current Chief Justice is Alan Blow, who was appointed by Governor Peter Underwood in 2013.
Chief Justice of Tasmania
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The current Chief Justice is Anne Ferguson, who was appointed by Governor Linda Dessau to succeed Marilyn Warren. Ferguson's term began on 2 October 2017.
Chief Justice of Victoria
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The Chief Justice of Nigeria or CJN is the head of the judicial arm of the government of Nigeria, and presides over the country's Supreme Court and the National Judicial Council The current Chief Justice is Ibrahim Tanko Muhammad who was controversially appointed on the 25th January 2019 by the Nigerian President Muhammadu Buhari in acting capacity, pending the determination of the trial against Walter Samuel Nkanu Onnoghen the former Chief Justice, by the Code of Conduct Tribunal. 
The Supreme Court of Nigeria is the highest court in Nigeria and its decisions are final. The Chief Justice of Nigeria is nominated by the President of the Federal Republic of Nigeria upon recommendation by the National Judicial Council and is subject to confirmation by the Senate of the Federal Republic of Nigeria. The CJN holds office at the pleasure of the Nigerian constitution and can only be removed from office by death or on attainment of age 70 whichever occurs first or by impeachment by the Senate of the Federal Republic of Nigeria which requires a super majority of the members of the Nigerian Senate
Chief Justice of Nigeria
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Since the Supreme Court was established in 1789, 17 people have served as chief justice. The first was John Jay (1789–1795). The current chief justice is John Roberts (since 2005). John Rutledge, Edward Douglass White, Charles Evans Hughes, Harlan Fiske Stone, and William Rehnquist served as associate justice prior to becoming chief justice.
Chief Justice of the United States
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The Chief Justice is the chairman of the Judicial Council of Ghana. The council is expected to propose judicial reforms to the Ghana government to help improve the level of administration of justice and efficiency in the Judiciary. It is also expected to be a forum to enhance the administration of justice in Ghana.The current Chief Justice is Sophia Akuffo. She succeeded Georgina Wood who was Ghana's first female Chief Justice.
Akuffo was sworn in as Chief Justice by President Akufo-Addo on 19 June 2017.
Chief Justice of Ghana
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The current Chief Justice is Tom Bathurst, who was appointed by Governor Marie Bashir to succeed Jim Spigelman, effective 1 June 2011.
Chief Justice of New South Wales
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Alan Michael Blow (born 3 December 1949) is an Australian judge who is the current Chief Justice of Tasmania.
Alan Blow
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Three incumbent associate justices have been nominated by the president and confirmed by the Senate as chief justice: Edward Douglass White in 1910, Harlan Fiske Stone in 1941, and William Rehnquist in 1986. A fourth, Abe Fortas, was nominated to the position in 1968, but was not confirmed. As an associate justice does not have to resign his or her seat on the Court in order to be nominated as chief justice, Fortas remained an associate justice. Similarly, when associate justice William Cushing was nominated and confirmed as chief justice in January 1796, but declined the office, he too remained on the Court. Two former associate justices subsequently returned to service on the Court as chief justice. John Rutledge was the first. President Washington gave him a recess appointment in 1795. However, his subsequent nomination to the office was not confirmed by the Senate, and he left office and the Court. In 1933, former associate justice Charles Evans Hughes was confirmed as chief justice. Additionally, in December 1800, former chief justice John Jay was nominated and confirmed to the position a second time, but ultimately declined it, opening the way for the appointment of John Marshall.
Chief Justice of the United States