Establishment:
The men of God’s House of Justice have been charged with the affairs of the people. They, in truth, are the Trustees of God among His servants and the daysprings of authority in His countries.
(Baha’u’llah: Aqdas: Other Sections, p. 91)

And now, concerning the House of Justice which God hath ordained as the source of all good and freed from all error, it must be elected by universal suffrage, that is, by the believers. Its members must be manifestations of the fear of God and daysprings of knowledge and understanding, must be steadfast in God’s faith and the well-wishers of all mankind. By this House is meant the Universal House of Justice, that is, in all countries a secondary House of Justice must be instituted, and these secondary Houses of Justice must elect the members of the Universal one. Unto this body all things must be referred. It enacteth all ordinances and regulations that are not to be found in the explicit Holy Text.
(`Abdu’l-Baha: Will and Testament, p. 14)

The Supreme House of Justice should be elected according to the system followed in the election of the parliaments of Europe. And when the countries would be guided, the Houses of Justice of the various countries would elect the Supreme House of Justice.
At whatever time all the beloved of God in each country appoint their delegates, and these in turn elect their representatives, and these representatives elect a body, that body shall be regarded as the Supreme House of Justice.
(`Abdu’l-Baha: Establishment of U.H.J., p. 322)

For instance, the Universal House of Justice,(1) if it be established under the necessary conditions – with members elected from all the people – that House of Justice will be under the protection and the unerring guidance of God. If that House of Justice shall decide unanimously, or by a majority, upon any question not mentioned in the Book, that decision and command will be guarded from mistake. Now the members of the House of Justice have not, individually, essential infallibility; but the body of the House of Justice is under the protection and unerring guidance of God: this is called conferred infallibility.
(`Abdu’l-Baha: Some Answered Questions, pp. 172-173)

The National Spiritual Assemblies, like unto pillars, will be gradually and firmly established in every country on the strong and fortified foundations of the Local Assemblies. On these pillars, the mighty edifice, the Universal House of Justice, will be erected, raising high its noble frame above the world of existence. The unity of the followers of Baha’u’llah will thus be realized and fulfilled from one end of the earth to the other. The explicit ordinances of His Most Holy Book will be promulgated, applied and carried out most befittingly in the world of creation, and the living waters of everlasting life will stream forth from that fountain-head of God’s World Order upon all the warring nations and peoples of the world, to wash away the evils and iniquities of the realm of dust, heal man’s age-old ills and ailments.
(Shoghi Effendi: Establishment of the UHJ, p. 333)

In His Will and Testament Abdu’l-Baha conferred the mantle of Guardian of the Cause and infallible Interpreter of its teachings upon His eldest grandson, Shoghi Effendi, and confirmed the authority and guarantee of divine guidance decreed by Baha’u’llah for the Universal House of Justice on all matters “which have not outwardly been revealed in the Book”. The Guardianship and the Universal House of Justice can thus be seen to be, in the words of Shoghi Effendi, the “Twin Successors” of Baha’u’llah and Abdu’l-Baha. They are the supreme institutions of the Administrative Order which was founded and anticipated in the Kitab-i-Aqdas and elaborated by Abdu’l-Baha in His Will.
During the thirty-six years of his ministry, Shoghi Effendi raised up the structure of elected Spiritual Assemblies – the Houses of Justice referred to in the Kitab-i-Aqdas, now in their embryonic stage – and with their collaboration initiated the systematic implementation of the Divine Plan that Abdu’l-Baha had laid out for the diffusion of the Faith throughout the world. He also set in motion, on the basis of the strong administrative structure that had been established, the processes which were an essential preparation for the election of the Universal House of Justice. This body, which came into existence in April 1963, is elected through secret ballot and plurality vote in a three-stage election by adult Baha’is throughout the world. The revealed Word of Baha’u’llah, together with the interpretations and expositions of the Centre of the Covenant and the Guardian of the Cause, constitute the binding terms of reference of the Universal House of Justice and are its bedrock foundation.
(The Universal House of Justice: Aqdas: Other Sections, pp. 3-4)

Duties and Functions:
We exhort the men of the House of Justice and command them to ensure the protection and safeguarding of men, women and children. It is incumbent upon them to have the utmost regard for the interests of the people at all times and under all conditions.
(Baha’u’llah: Tablets of Baha’u’llah, pp. 69-70)

It is incumbent upon the Trustees of the House of Justice to take counsel together regarding those things which have not outwardly been revealed in the Book, and to enforce that which is agreeable to them. God will verily inspire them with whatsoever He willeth, and He, verily, is the Provider, the Omniscient.
(Baha’u’llah: Tablets of Baha’u’llah, p. 68)

Inasmuch as for each day there is a new problem and for every problem an expedient solution, such affairs should be referred to the Ministers of the House of Justice that they may act according to the needs and requirements of the time. They that, for the sake of God, arise to serve His Cause, are the recipients of divine inspiration from the unseen Kingdom. It is incumbent upon all to be obedient unto them. All matters of State should be referred to the House of Justice, but acts of worship must be observed according to that which God hath revealed in His Book.
(Baha’u’llah: Tablets of Baha’u’llah, p. 27)

Religion bestoweth upon man the most precious of all gifts, offereth the cup of prosperity, imparteth eternal life, and showereth imperishable benefits upon mankind. It behoveth the chiefs and rulers of the world, and in particular the Trustees of God’s House of Justice, to endeavour to the utmost of their power to safeguard its position, promote its interests and exalt its station in the eyes of the world. In like manner it is incumbent upon them to enquire into the conditions of their subjects and to acquaint themselves with the affairs and activities of the divers communities in their dominions.
(Baha’u’llah: Tablets of Baha’u’llah, p. 130)

It is incumbent upon the ministers of the House of Justice to promote the Lesser Peace so that the people of the earth may be relieved from the burden of exorbitant expenditures.
(Baha’u’llah: Tablets of Baha’u’llah, p. 89)

In the conduct of the administrative affairs of the Faith, in the enactment of the legislation necessary to supplement the laws of the Kitab-i-Aqdas, the members of the Universal House of Justice, it should be borne in mind, are not, as Baha’u’llah’s utterances clearly imply, responsible to those whom they represent, nor are they allowed to be governed by the feelings, the general opinion, and even the convictions of the mass of the faithful, or of those who directly elect them. They are to follow, in a prayerful attitude, the dictates and promptings of their conscience. They may, indeed they must, acquaint themselves with the conditions prevailing among the community, must weigh dispassionately in their minds the merits of any case presented for their consideration, but must reserve for themselves the right of an unfettered decision. “God will verily inspire them with whatsoever He willeth,” is Baha’u’llah’s incontrovertible assurance. They, and not the body of those who either directly or indirectly elect them, have thus been made the recipients of the divine guidance which is at once the life-blood and ultimate safeguard of this Revelation.
(Shoghi Effendi: World Order of Baha’u’llah, p. 153)

Legislative Powers:
Those matters of major importance which constitute the foundation of the Law of God are explicitly recorded in the Text, but subsidiary laws are left to the House of Justice. The wisdom of this is that the times never remain the same, for change is a necessary quality and an essential attribute of this world, and of time and place. Therefore the House of Justice will take action accordingly.
Let it not be imagined that the House of Justice will take any decision according to its own concepts and opinions. God forbid! The Supreme House of Justice will take decisions and establish laws through the inspiration and confirmation of the Holy Spirit, because it is in the safekeeping and under the shelter and protection of the Ancient Beauty, and obedience to its decisions is a bounden and essential duty and an absolute obligation, and there is no escape for anyone.
Say, O people: Verily the Supreme House of Justice is under the wings of your Lord, the Compassionate, the All-Merciful, that is, under His protection, His care, and His shelter; for He has commanded the firm believers to obey that blessed, sanctified and all-subduing body, whose sovereignty is divinely ordained and of the Kingdom of Heaven and whose laws are inspired and spiritual.
(`Abdu’l-Baha: Establishment of U.H.J., p. 323)

It is incumbent upon these members (of the Universal House of Justice) to gather in a certain place and deliberate upon all problems which have caused difference, questions that are obscure and matters that are not expressly recorded in the Book. Whatsoever they decide has the same effect as the Text itself. Inasmuch as the House of Justice hath power to enact laws that are not expressly recorded in the Book and bear upon daily transactions, so also it hath power to repeal the same. Thus for example, the House of Justice enacteth today a certain law and enforceth it, and a hundred years hence, circumstances having profoundly changed and the conditions having altered, another House of Justice will then have power, according to the exigencies of the time, to alter that law. This it can do because these laws form no part of the divine explicit Text. The House of Justice is both the initiator and the abrogator of its own laws.
(`Abdu’l-Baha: Will and Testament, p. 20)

Referring to both the Guardian and the Universal House of Justice we read these emphatic words: “The sacred and youthful Branch, the Guardian of the Cause of God, as well as the Universal House of Justice to be universally elected and established, are both under the care and protection of the Abha Beauty, under the shelter and unerring guidance of the Exalted One (the Bab) (may my life be offered up for them both). Whatsoever they decide is of God.”
From these statements it is made indubitably clear and evident that the Guardian of the Faith has been made the Interpreter of the Word and that the Universal House of Justice has been invested with the function of legislating on matters not expressly revealed in the teachings. The interpretation of the Guardian, functioning within his own sphere, is as authoritative and binding as the enactments of the International House of Justice, whose exclusive right and prerogative is to pronounce upon and deliver the final judgment on such laws and ordinances as Baha’u’llah has not expressly revealed. Neither can, nor will ever, infringe upon the sacred and prescribed domain of the other. Neither will seek to curtail the specific and undoubted authority with which both have been divinely invested.
(Shoghi Effendi: World Order of Baha’u’llah, pp. 149-150)

Obedience by Believers:
A universal, or international, House of Justice shall also be organized. Its rulings shall be in accordance with the commands and teachings of Baha’u’llah, and that which the Universal House of Justice ordains shall be obeyed by all mankind. This international House of Justice shall be appointed and organized from the Houses of Justice of the whole world, and all the world shall come under its administration.
(`Abdu’l-Baha: Promulgation of Universal Peace, p. 455)

…There are statements from the Master and the Guardian indicating that the Universal House of Justice, in addition to being the Highest Legislative Body of the Faith, is also the body to which all must turn, and is the `apex’ of the Baha’i Administrative Order, as well as the `supreme organ of the Baha’i Commonwealth.’
(The Universal House of Justice: Lights of Guidance, p. 315)

1. The House of Justice (Baytu’l-Adl) is an institution created by Baha’u’llah. He refers to two levels of this institution: the Local Houses of Justice, responsible for each town or village, and the Universal House of Justice. Abdu’l-Baha, in His Will and Testament, added an intermediate level, the Secondary Houses of Justice. It is only on the Universal House of Justice that infallibility has been conferred. At the present time, to stress their purely spiritual functions, the Local and Secondary Houses of Justice are designated Local and National Spiritual Assemblies.