According to law, the Supreme Court must have a President and at least 15 members. The Court now consists of 18 members. The average age of the current justices, while having been appointed, is 48. Like many other Finnish employees, the justices must retire at 68. Otherwise, they enjoy the constitutional right to remain in office, unless they are impeached by the High Court of Impeachment or found medically incapable by the Supreme Court. The referendaries enjoy a similar constitutional right to remain in office, but their work-related offences are handled by the Court of Appeals of Helsinki, instead of the High Court of Impeachment.