The chief justice can be selected in many ways, but, in many nations, the position is given to the most senior justice of the court, while, in the United States, the chief justice is appointed by the President, subject to approval by the United States Senate. Although the title of this top American jurist is, by statute, Chief Justice of the United States, the term "Chief Justice of the Supreme Court" is often used unofficially.
The chief justice's personal ruling is equal in weight to the rulings of any associate judges on the court.
In several countries, the chief justice is second in line to the office of president or governor general (or third in line, if there is a vice president or lieutenant governor general), should the incumbent die or resign. For example, if the Governor General of Canada is unable to perform the duties of the office, the Chief Justice of Canada performs the duties of the governor general. In India, in the event the President and the Vice- President are unable to discharge the functions due to death, resignation or removal, the Chief Justice of India acts as Officiating President of India.
^Judges Law of the People's Republic of China, Article 16: "Judges are divided into twelve grades. The President of the Supreme People's Court is the Chief Justice."