The Principal Policy and Decision-making Institutions of the Alliance Key to the Principal NATO Committees 6. High Level Task Force on Conventional Arms Control (HLTF) Members All member countries. Chairman Deputy Secretary General; Acting Chairman Assistant Secretary General for Political Affairs. Role Consultative and advisory body to Foreign and Defence Ministers on conventional arms control issues. Levels Experts from Ministries of Foreign Affairs and Ministries of Defence at the level of Political Directors; Political Advisors to NATO delegations. Principal Subordinate Committees HLTF at Deputies level. International Staff Support Division of Political Affairs (Disarmament Arms Control and Cooperative Security Section); Executive Secretariat.