4. Self-defence and the United Nations Charter.

According to the Charter of the United Nations1, nothing in it impairs the inherent right of individual or collective self-defence if an armed attack2 occurs against a member of the United Nations, until the Security Council has taken measures necessary to maintain international peace and security3. It is clear that the Charter of the United Nations did not subsume and supervene pre-existing customary international law in relation to self-defence4, but it remains controversial whether the Charter merely regulates the use of self-defence in the event of an armed attack actually taking place upon a state, or whether force may