The longest running and most permanent supranational court is the:

Question

Quizplus · Accepted Answer

The International Court of Justice (ICJ) is the principal judicial organ of the United Nations and has been in operation since 1946. It is tasked with settling legal disputes between states and providing advisory opinions on legal questions referred to it by UN bodies and specialized agencies. It is the only international court to have a universal mandate, meaning it can hear cases involving any state that agrees to its jurisdiction. While the other courts listed have also been in operation for extended periods, the ICJ is the only one that is truly permanent and has a broad mandate.

The Longest Running and Most Permanent Supranational Court Is The