 The institutional status of the authority of ʻAbdu'l-Bahá and a House of Justice are specifically delineated.On the basis of the authority granted ʻAbdu'l-Bahá he extended forms of the authority vested in him to the Guardianship, whose sole member was Shoghi Effendi, and the Universal, or International, House of Justice through his Will and Testament.This was confirmed and amplified in other texts, notably the Kitáb-i-'Ahd.