The Kitáb-i-Aqdas - The Most Holy Book
Index term: membership, under House of Justice, Universal (International)
n50.
the number of Bahá
The abjad numerical equivalent of "Bahá" is nine. The Universal House of Justice and the National and Local Spiritual Assemblies currently have nine members each, the minimum number prescribed by Bahá'u'lláh.
n80.
O ye Men of Justice!
It has been elucidated in the writings of 'Abdu'l-Bahá and Shoghi Effendi that, while the membership of the Universal House of Justice is confined to men, both women and men are eligible for election to Secondary and Local Houses of Justice (currently designated as National and Local Spiritual Assemblies).