c) is in arrears for more than one year in the payment of contributions to SADC, for reasons other than those caused by natural calamity or exceptional circumstances that gravely affect its economy, and has not secured the dispensation of the Summit. 2. The sanctions shall be determined by the Summit on a case-by-case basis. ARTICLE 34 WITHDRAWAL 1. A Member State wishing to withdraw from SADC shall serve notice of its intention in writing, a year in advance, to the Chairman of SADC, who shall inform other Member States accordingly. 2. At the expiration of the period of notice, the Member State shall, unless the notice is withdrawn, cease to be a member of SADC. 3. During the one year period of notice referred to in paragraph 1 of this Article, the Member State wishing to withdraw form SADC shall comply with the provisions of this Treaty, and shall continue to be bound by its obligations. 4. A Member State which has withdrawn shall not be entitled to claim any property or rights until the dissolution of SADC. 5. Assets of SADC situated in the territory of a Member State which has withdrawn, shall continue to be the property of SADC and be available for its use. 6. The obligations assumed by Member States under this Treaty shall, to the extent necessary to fulfil such obligations, survive the termination of membership by any State. ARTICLE 35 DISSOLUTION 1. The Summit may decide by a resolution supported by three-quarters of all members to dissolve SADC or any of its Institutions, and determine the terms and conditions of dealing with its liabilities and disposal of its assets. 2. A proposal for the dissolution of SADC may be made to the Council by any Member State, for preliminary consideration, provided, however, that such a proposal shall not be submitted for the decision of the Summit until all Member Sates have been duly notified of it and a period of twelve months has elapsed after the submission to the Council. Chapter Fourteen AMENDMENT OF THE TREATY ARTICLE 36 1. An amendment of this Treaty shall be adopted by a decision of three-quarters of all the Members of the Summit. 2. A proposal for the amendment of this Treaty may be made to the Executive Secretary by any Member State for preliminary consideration by the Council, provided, however, that the proposed amendment shall not be submitted to the Council for preliminary consideration until all Member States have been duly notified of it, and a period of three months has elapsed after such notification.