Both the use and threat of nuclear weapons are illegal  The disproportionate and indiscriminate nature of nuclear weapons use renders their possession illegal under international humanitarian law. The International Court of Justice in 1996, asked to provide an advisory opinion, declared unanimously that any use or threat of nuclear weapons had to be compatible with existing international law relating to armed conflict (International Court of Justice, 1996). The principles of discrimination and proportionality inherent in the laws of wars are codified in the Geneva Conventions of 1949, and are quite clearly violated by nuclear weapons. As such, a majority of the judges present felt that any such use or threat would ‘generally be contrary’ to those rules of international law and therefore, unanimously, ‘there exists an obligation 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’ (International Court of Justice, 1996).