UN CHARTER 4. The Charter of the United Nations applies to States’ conduct in cyberspace, as it does to their other conduct. 5. Article 2(4) of the UN Charter prohibits the threat or use of force against the territorial integrity or political independence of any State or in any other manner inconsistent with the purposes of the United Nations. Depending on the facts and circumstances in each case, conduct by States carried out in cyberspace is capable of constituting a threat or use of force if the actual or threatened conduct has or would have the same or similar effects of conduct using kinetic means. The circumstances in which the threat or use of force is not unlawful under international law are the same irrespective of whether the conduct is by kinetic or cyber means. 6. An operation carried out by cyber means may constitute an armed attack giving rise to the inherent right of individual or collective self-defence, as recognised in Article 51 of the UN Charter where the scale and effects of the operation are equivalent to those of an armed attack using kinetic means. Factors in considering the scale and effects of an attack may include the (actual or anticipated) physical destruction of property, injury and death. The exercise of the inherent right of self-defence against an imminent or on-going armed attack whether by kinetic or cyber means, may itself be by cyber or kinetic means and must always fulfil the requirements of necessity and proportionality. Whether or not to have recourse to the exercise of the inherent right of self-defence will always be carefully considered having regard to all the circumstances. 7. Article 2(3) and the provisions of Chapter VI of the Charter on the peaceful settlement of disputes can equally apply in relation to States’ activities in cyberspace. Thus, in accordance with Article 33(1), States that are party to any cyber-related international dispute the continuation of which is likely to endanger the maintenance of international peace and security, shall endeavour to settle such dispute by peaceful means as described in Article 33 of the Charter: negotiation, enquiry, mediation, conciliation, arbitration, judicial settlement, resort to regional agencies or arrangements, or other peaceful means of their own choice. NON-INTERVENTION & SOVEREIGNTY 8. Below the threshold of the threat or use of force, the customary international law rule prohibiting interventions in the domestic affairs of States applies to States’ operations in cyberspace as it does to their other activities. As set out by the International Court of Justice in its judgment in the Nicaragua case, the purpose of the rule on non-intervention is to ensure that all States remain free from external coercive intervention in matters 3