Southern African Development Community 5. The Chairperson of ISDSC shall convene at least one meeting on an annual basis. 6. The Chairperson of ISDSC may convene such other meetings as he or she deems necessary or as requested by another minister serving on ISDSC. 7. ISDSC shall retain the Defence, State Security and Public Security SubCommittees and other subordinate structures of the existing Inter-State Defence and Security Committee. 8. ISDSC may establish such other structures as it deems necessary to perform its functions. ARTICLES COMNUTTEEPROCEDURES The following provisions shall apply to the ministerial committees of the Organ: a) the quorum for all meetings shall be two-thirds of the State Parties; b) the ministerial committees shall determine their own rules of procedure; and c) decisions shall be taken by consensus. Protocol on Politics, Defence and Security Co-operation 9