The Principal Policy and Decision-making Institutions of the Alliance Key to the Principal NATO Committees 10. NATO Consultation Command and Control Board (NC3B) Members All member countries. Chairman Deputy Secretary General. Permanent Chairman Assistant Secretary General for Defence Support. Co Vice-Chairmen : Director of the NATO Headquarters C3 Staff and an elected national Co Vice-Chairman. Role Senior body acting on behalf of the North Atlantic Council and Defence Planning Committee on all matters relating to Consultation, Command and Control (C3) throughout the Organisation. Levels As the directing body of NATO's C3 structure the C3 board brings together national representatives with representatives of all other interested parties, including the Military Committee, Major NATO Commanders, CNAD, SCEPC, ACCS, COEC, NADC, NACMO BOD, NAPMO BOD, NSC, PMSC, NCS, SRB, NACOSA and NC3 Agency. Principal Subordinate Committees Group of National C3 Representatives acting as the Board in permanent session, working groups and subcommittees. International Staff Support NATO Headquarters C3 Staff (NHQC3S); Executive Secretariat.