The united nations international court of justice acts as the

Principal judicial arm of the United Nation (UN)

Explanation:

The  international court of justice with acronym (ICJ) established in June 1945 by the Charter of the United Nations is the organ of the United Nations (UN) that is charged with the responsibility of  settling dispute brought to it by member states in line with international law. it also serves as advisory body on legal matters referred to it by the United Nations (UN). It is also known as World Court.

While all the main organs of the UN are located in New York, it is only The  international court of justice that is located outside New York. The Court has its seat at the Hague (Netherlands)