sentences:  Following the death of a Caliph, the leader of the Community, a pledge of allegiance is taken by the newly chosen Caliph from members of the Community based upon this prophetic model and the bay'ah is the standard procedure for formally joining the Ahmadiyya Muslim Community.Since 1993, a large Bay'ah is held on an international scale every year during the annual gathering of the Community.The Bay'ah is taken by the caliph at whose hand new converts pledge their allegiance and old members of the Community can reaffirm their pledges.