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The work of the Nuclear Planning Group is prepared by an NPG Staff Group composed of members of the national delegations of all participating member countries. The Staff Group prepares meetings of the NPG Permanent Representatives and carries out detailed work on their behalf. It meets once a week and at other times as necessary.
The senior advisory body to the NPG on nuclear policy and planning issues is the NPG High Level Group (HLG). In 1998/1999, the HLG also took over the functions and responsibilities of the former Senior Level Weapons Protection Group (SLWPG) which was charged with overseeing nuclear weapons safety, security and survivability matters. The HLG is chaired by the United States and is composed of national policy makers and experts from capitals. It meets several times a year to discuss aspects of NATO's nuclear policy, planning and force posture, and matters concerning the safety, security and survivability of nuclear weapons.
The NPG itself meets when necessary at the level of Ambassadors and twice a year at the level of Ministers of Defence.
