Another must either retire, or die. Either way, a new justice only comes in when an old one leaves.
The justice must be approved by the senate.
The justice must be approved by the senate.
The Chief Justice of the Supreme Court.
The justice must be approved by the senate.
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A Supreme Court justice must remain above reproach in his or her personal life. Justices can be impeached if they are guilty of moral turpitude or crimes of law.
No age is required to be a Chief Justice of the US Supreme Court
The senate
When they're no longer capable of executing their duty as Supreme Court Justice. As long as they're capable of adequately performing their duties, they have no limit to how long they may serve.
The US President nominates the Chief Justice, who may already be an Associate Justice or may be someone outside the Supreme Court. The Senate must confirm the nomination by a simple majority vote.
The justices of the Supreme Court are appointed for life by the President.
The President of the United States nominates individuals to serve on the Supreme Court. The nomination must then be confirmed by the Senate before the individual can be appointed as a Supreme Court Justice.