How does the international court of justice opinion on nuclear weapons in the case of "legality of the threat or use of nuclear weapons 1996" demonstrates some of the theories of international law (on the nature, role or limits of international law in world politics).

There opinion was that there is no source of law, customary or treaty, that explicitly prohibits the possession or even use of nuclear weapons. The only requirement being that their use must be in conformity with the law on self-defence and principles of international humanitarian law.