The advisory opinion of the International Court of Justice on 8 July 1996 ruled on the casting vote of the President of the Court that the threat or use of nuclear weapons would generally be contrary to the rules of international law applicable in armed conflict, and in particular the principals and rules of humanitarian law. However, the Court could not conclude definitely whether the threat or use of nuclear weapons would be lawful in an extreme circumstance of self-defence, in which the very survival of a State would be at stake.
An important aspect of the opinion was that the Court unanimously concluded that there exists an obligation on nuclear weapons states to pursue in good faith and bring to a conclusion negotiations leading to nuclear disarmament in all its aspects under strict and effective international control.
I believe that the examination by the Court of the question of the legality of the threat or use of nuclear weapons has provided compelling arguments for further and deeper consideration of the moral and legal framework on which the possible use of nuclear weapons has been premised in the postwar period.