This answer was given to a specific point and with your question can have a differnt response.
The Universal House of Justice was ordained by Baha'u'llah to carry into the Future the required guidance given by Baha'u'llah for all Humanity.
Hierarchy is "a system in which members of an organization or society are ranked according to relative status or authority."
There is no individual rank in the Baha'i Faith, the Elected people that form the Universal House of Justice hold not status as an individual, the body as a whole is the Authority. The Appointed people to advisory rolls, hold no rank.
synonyms are pecking order, ranking, grading, ladder,social order, social stratum, social scale,class system.
There is none of this in the Baha'i Faith
Thus the Institutions we elect and then we then turn to guidance from is the Infallable Universal House of Justice who oversear the National Houses of Justice and the Local Houses of Justice (Currently Spiritual Assemblies at National & Local Levels) and the Appointed arms.of the Faith.
No individual has a 'rank' in any of this system.
We are all Baha'i
Regards Tony