There is no unified position on cluster munitions within NATO. However, the majority of members of NATO are part of this group of 46 nations that committed to a new treaty within a two-year period of time. On this issue they will have to devise some approach that will allow them to continue to operate, much in the way they did with anti-personnel mines. Now only one member of NATO is not a member of the Mine Ban Treaty.
On March 1st, 2007. See this statement in context.