Would the United States Doctrine of Preventative War be Justified as a United Nations Doctrine?

On the same day, 23 September 2003, that President George W. Bush defended his Iraq policy to the General Assembly of the United Nations, Secretary-General Kofi Annan also spoke to the Assembly. Annan reiterated his opposition to the view that states may independently be justified in using military force “preemptively” to avoid the dangers posed by the spread of weapons of mass destruction (WMD) among states and terrorists, including nuclear, biological, and chemical weapons.