Note: You may be looking for the head of the Judicial Branch in the United States government, the US Supreme Court.
The UPC Supreme Court is the head of the Judcial Branch of the UPC, like the US Government. The Supreme Court formerly consisted of 20 members, but one was recently added due to the risk of a tie. There are now 20 members. Members of the Supreme Court are appointed by the President of the UPC. However, the leading positions, Chief Justice, Assistant Chief Justice, and Secretary of the Court, are appointed by a vote within the UPC Supreme Court. The Supreme Court judges the actions of the UPC Presidency, Organization Councils, and Armies. They also judge highly debated cases that are passed up by lower courts, and judge to see whether laws passed by the UPC and Congress are constitutional.
The Chief Justice's main duties involve leading the court, choosing cases to take with the other two officers, and taking care of many official matters. The Chief Justice serves as the Secretary of the UPC Government Council.
The Assistant Chief Justice aids the Chief Justice in his duties, choosing cases with the other two officers, and taking care of official matters. The Assistant Chief Justice can sub for the Chief Justice, and would take over hs position in the case of death, injury, health problems, capture, and impeachment. The Assistant Chief Justice serves in the UPC Government Council.
The Secretary of the Court takes detailed notes of meetings, helps choose cases with the other officers, and is second-in-line for taking over the Chief Justice's position in the case of death, injury, health problems, capture, and impeachment if the Assistant Chief Justice cannot. The Secretary of the Court serves in the UPC Government Council.
In the Supreme Court, there are 21 Supreme Court Justices, all of which are appointed by the President of the UPC. Though they are appointed by him, they cannot be removed by him. The only way for a Justice to be taken out is if they step down, die, are arrested or commit a crime and can therefore cannot serve in their positions any longer, or if the rest of the Supreme Court unanimously decides that they must be removed for some reason. Justices are also the only ones who can run for the positions of Chief Justice, Assistant Chief Justice, and Secretary of the Court. All the members of the Presidency of the UPC Supreme Court continue to serve in the same roles as the Justices in the fact that they vote in decisions made by the Supreme Court on whether they should reprimand someone or an organization for its actions, for whether a law is constitutional or just, or what the resolution should be in certain debates that they choose after they request to be viewed by the Court. The Presidency has the same number of votes as an ordinary Justice.