Once a month, the Board of Trustees chair convenes a meeting of the Chairs of World Service Conference committees and Intergroup Service Representatives of the intergroups. Chairs-elect and ISRs-elect are also invited to this meeting. The purpose of this group is to consider the implications of any proposal on each committee, intergroup, and GSA as a whole. The review is a three-month process so that the Chairs and ISRs have time to discuss the proposal with their members and bring their input back to the originating committee. Only when the Chairs/ISRs approve a proposal with two thirds unanimity does it go to the Board of Trustees for consideration.