2. If the Security Council deems that the continuance of the dispute is in fact likely to endanger the maintenance of international peace and security, it shall decide whether to take action under Article 36 or to recommend such terms of settlement as it may consider appropriate. employed to give effect to its decisions, and it may call upon the Members of the United Nations to apply such measures. These may include complete or partial interruption of economic relations and of rail, sea, air, postal, telegraphic, radio, and other means. of communication, and the severance of diplomatic relations. Article 38 Without prejudice to the provisions of Articles 33 to 37, the Security Council may, if all the parties to any dispute so request, make recgmmendations to the parties with a view to a pacific settlement of the dispute. CHAPTER Vll ACTION WITH RESPECT TO THREATS TO THE PEACE, BREACHES OF THE PEACE, AND ACTS OF AGGRESSION Article 39 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. Article 40 ltll order to prevent an aggravation of the situa· tion, the Security Council may, before making the recommendations or deciding upon the measures provided for' in Article 39, call upon the parties concerned to comply with such provisional measures as it·deems necessary or desirable.Such provisional measures shall be without prejudice to the rights, claims,or position of the parties concerned. The Security Council shall duly take account of failure to comply with such provisional measures. Article 42 Should the Security Council consider that measures provided for in Article 41 would be inadequate or have proved to be inadequate, it may take such action by air, sea, or land forces as may be necessary to maintain or restore international peace and security. Such action may include demonstrations, blockade, and other operations by air, sea, or land forces of Members of the United Nations. Article 43 I. All Members of the United Nations, in order to contribute to the maintenance of international peace and security, undertake to make available to the Security Council, on its call and in accordance with a special agreement or agreements, armed forces, assistance, and facilities, including rights of passage, necessary for the purpose of maintaining international peace and security. 2. Such agreement or agreements shall govern the numbers and types of forces, their degree of readiness and general location, and the nature of the facilities and assistance to be provided. 3. The agreement or agreements shall be negotiated as soon as possible on the initiative of the Security Council. They shall be concluded be: tween the Security Council and Members or between theSecurity Council and groupsof Members and shall be subject to ratification by the signatory states in accordance with their respective constitutional processes. . Article 41 Article 44 The Security Council may decide what measures not involving the use of armed force are to be ,When the Security Council has d cided to use force it shall, before calling upon a Member not 9