1) Are the Universal House of Justice and a Supreme Tribunal Novel?
Bahā’u’llāh and `Abdu’l-Bahā had given orders for the Universal House of Justice to be based on British and European administrative systems. Thus they cannot claim that their administrative system is in any way novel.
2) Did the leaders of Baha’ism act upon this principle?
According to Bahā’u’llāh, `Abdu’l-Bahā, and Shoghi’s strict orders and directives, the Universal House of Justice is only legal if it is headed by the Guardian of the Cause. After Shoghi the Guardian ceased to exist and this principle is no longer applicable. Before Baha’is preach the establishment of a Supreme tribunal, they should first resolve their inner problems and then postulate that their teachings are the only hope for establishing world peace.
3) Is this principle rational and logical?
Baha’is claim that the Universal House of Justice is infallible. How can the decisions of an institute made of up a group of fallible people who have in turn been selected by another group of fallible people be free from error?! The exact same trend exists in all parliaments and poll-based decision making circles and none have ever claimed that their decisions are final and free from error. If the infallibility of the UHJ is a result of it being headed by the Guardian of the Cause, then even by this standard the UHJ is fallible since it is being operated without the supervision of a Guardian.
Thus claiming that this body is infallible and its decisions final is in no way reasonable.
Courtesy: Twelve Principles – A Comprehensive Investigation on the Bahai Teachings