The Misaq has to be traken by every Bohra at the age of fifteen. This oath of allegiance to a living human being and the concept of a priestly class marks the Bohras as apart from the rest of Islam.
The head of the community, the Dai ul Mutlaq, appoints the next successor. The chief of the Bohras, the Sydena, exercises immense control over the community.
He collects taxes and how these funds will be utilized are left for him to decide. No one is allowed to question the lifestyle of the Sydena, or the feasibility of the oath in this day and age.