Judges at the International Court of Justice serve a tenure of 9 years.
The ICJ, based in The Hague, Netherlands, has 15 judges elected by both the United Nations General Assembly and the Security Council, voting separately. Elections are staggered so that roughly one-third of the seats, about 5 judges, come up for election every 3 years, keeping the bench experienced at all times.
A judge whose term ends can be re-elected for further 9-year terms. This system keeps continuity in the court while still allowing regular turnover of members.