The Kitáb-i-Aqdas - The Most Holy Book
Index term: House of Justice ordained, under Kitáb-i-Aqdas
k30.
The Lord hath ordained that in every city a House of Justice be established wherein shall gather counsellors to the number of Bahá, and should it exceed this number it doth not matter. They should consider themselves as entering the Court of the presence of God, the Exalted, the Most High, and as beholding Him Who is the Unseen. It behoveth them to be the trusted ones of the Merciful among men and to regard themselves as the guardians appointed of God for all that dwell on earth. It is incumbent upon them to take counsel together and to have regard for the interests of the servants of God, for His sake, even as they regard their own interests, and to choose that which is meet and seemly. Thus hath the Lord your God commanded you. Beware lest ye put away that which is clearly revealed in His Tablet. Fear God, O ye that perceive.
k42.
Endowments dedicated to charity revert to God, the Revealer of Signs. None hath the right to dispose of them without leave from Him Who is the Dawning-place of Revelation. After Him, this authority shall pass to the Aghsán, and after them to the House of Justice -- should it be established in the world by then -- that they may use these endowments for the benefit of the Places which have been exalted in this Cause, and for whatsoever hath been enjoined upon them by Him Who is the God of might and power. Otherwise, the endowments shall revert to the people of Bahá who speak not except by His leave and judge not save in accordance with what God hath decreed in this Tablet -- lo, they are the champions of victory betwixt heaven and earth -- that they may use them in the manner that hath been laid down in the Book by God, the Mighty, the Bountiful.
n49.
The Lord hath ordained that in every city a House of Justice be established
The institution of the House of Justice consists of elected councils which operate at the local, national and international levels of society. Bahá’u’lláh ordains both the Universal House of Justice and the Local Houses of Justice in the Kitáb-i-Aqdas. ‘Abdu’l-Bahá, in His Will and Testament, provides for the Secondary (National or Regional) Houses of Justice and outlines the method to be pursued for the election of the Universal House of Justice.
In the verse cited above, the reference is to the Local House of Justice, an institution which is to be elected in a locality whenever there are nine or more resident adult Bahá’í­s. For this purpose, the definition of adult was temporarily fixed at the age of 21 years by the Guardian, who indicated it was open to change by the Universal House of Justice in the future.
Local and Secondary Houses of Justice are, for the present, known as Local Spiritual Assemblies and National Spiritual Assemblies. Shoghi Effendi has indicated that this is a "temporary appellation" which,

. . . as the position and aims of the Bahá’í­ Faith are better understood and more fully recognized, will gradually be superseded by the permanent and more appropriate designation of House of Justice. Not only will the present-day Spiritual Assemblies be styled differently in future, but they will be enabled also to add to their present functions those powers, duties, and prerogatives necessitated by the recognition of the Faith of Bahá’u’lláh, not merely as one of the recognized religious systems of the world, but as the State Religion of an independent and Sovereign Power.
n66.
Aghsán
"Aghsán" (plural of Ghusn) is the Arabic word for "Branches". This term is used by Bahá’u’lláh to designate His male descendants. It has particular implications not only for the disposition of endowments but also for the succession of authority following the passing of Bahá’u’lláh (see note 145) and of ‘Abdu’l-Bahá. Bahá’u’lláh, in the Book of His Covenant, appointed ‘Abdu’l-Bahá, His eldest son, as the Centre of His Covenant and the Head of the Faith. ‘Abdu’l-Bahá, in His Will and Testament, appointed Shoghi Effendi, His eldest grandson, as the Guardian and Head of the Faith.
This passage of the Aqdas, therefore, anticipates the succession of chosen Aghsán and thus the institution of the Guardianship and envisages the possibility of a break in their line. The passing of Shoghi Effendi in 1957 precipitated the very situation provided for in this passage, in that the line of Aghsán ended before the Universal House of Justice had been established (see note 67).
n67.
revert to the people of Bahá
Bahá’u’lláh provides for the possibility that the line of Aghsán would terminate prior to the establishment of the Universal House of Justice. He designated that in such a situation “endowments shall revert to the people of Bahá”. The term “people of Bahá” is used with a number of different meanings in the Bahá’í­ Writings. In this instance, they are described as those “who speak not except by His leave and judge not save in accordance with what God hath decreed in this Tablet”. Following the passing of Shoghi Effendi in 1957, the Hands of the Cause of God directed the affairs of the Cause until the election of the Universal House of Justice in 1963 (see note 183).