The United Nations sent out an email instructing staff not to use the words “invasion” or “war’” when referring to Ukraine.
The Security Council shall determine the existence of any threat to the peace, breach of the peace, or act of aggression and shall make recommendations, or decide what measures shall be taken in accordance with Articles 41 and 42, to maintain or restore international peace and security. [...] Plans for the application of armed force shall be made by the Security Council with the assistance of the Military Staff Committee. [...] If preventive or enforcement measures against any state are taken by the Security Council, any other state, whether a Member of the United Nations or not, which finds itself confronted with special economic problems arising from the carrying out of those measures shall have the right to consult the Security Council with regard to a solution of those problems.