The Structure of the North Atlantic Treaty Organization is complex and multi-faceted. The decision-making body is the North Atlantic Council (NAC), and the member state representatives also sit on the Defence Policy and Planning Committee (DPPC) and the Nuclear Planning Group (NPG). Below that the Secretary General of NATO directs the civilian International Staff, that is divided into administrative divisions, offices and other organizations. Also responsible to the NAC, DPPC, and NPG are a host of committees that supervise the various NATO logistics and standardisation agencies. The NATO Military Committee advises and assists the NAC on military matters. The Defence Planning Committee which directs its output to the Division of Defence Policy and Planning, a nominally civilian department that works closely with the Military Committee's International Military Staff. All agencies and organizations are integrated into either the civilian administrative or military executive roles. For the most part they perform roles and functions that directly or indirectly support the security role of the alliance as a whole. History The Defence Planning Committee was a former senior decision-making body on matters relating to the integrated military structure of the Alliance. It was dissolved following a major committee review in June 2010 and its responsibilities absorbed by the North Atlantic Council and the Defence Policy and Planning Committee (DPPC). Civilian structure In NATO: The First Five Years Lord Ismay described the civilian structure as follows: The ..Office of the Secretary General [is] directed by an Executive Secretary, Captain R.D. Coleridge (UK), who is also Secretary to the Council. He is responsible for supervising the general processing of the work of the Council and their committees, including provision of all secretarial assistance, as well as supervision of the administrative services of the Staff/Secretariat itself. Thus the Secretariat provides secretaries to all the Council's principal committees and working groups - apart from those of a strictly technical nature - and ensures co-ordination between them. .. On the Staff side there are three main divisions corresponding to the three principal aspects of NATO's work, each under an Assistant Secretary General. Ambassador Sergio Fenoaltea (Italy) heads the Political Affairs Division, M. Rene Sergent (France) the Economics and Finance Division, and Mr. Lowell P. Weicker (USA) the Production and Logistics Division. The Divisions' tasks are to prepare, in close touch with delegations, proposed action in their respective fields for consideration by the appropriate committee or by the Council.