Answer: Sikhism
Notes: Sarbat Khalsa is a deliberative assembly of all factions of Sikhs that dates back to the 18th century. It is held twice a year on the occasion of Baisakhi and Diwali. The last "Sarbat khalsa" was held on February 16, 1986. It was recently announced that the convening of a Sarbat khalsa congregation is the sole prerogative of the Akal Takht chief.
