When the Baha'i State will be established...

Early in 1933, a Bahai wrote to Shoghi Effendi asking, “Is the universal Tribunal, sometimes called by the Master the International Court of Arbitration, identical with the Universal House of Justice? Or is it to be a separate judicial body, with jurisdiction to pass upon all disputes between nations and outside the control of the Universal House?” The reply, written on behalf of Shoghi Effendi, came back “The Universal Court of Arbitration and the International Tribunal are the same. When the Baha’i State will be established they will be merged in the Universal House of Justice.” (June 17, 1933)

https://www.bahai.org/library/authoritative-texts/the-universal-house-of-justice/messages/19850131_001/19850131_001.xhtml