ARTICLE21 DENUNCIATION 1 This Protocol may be denounced by any Member State at any time. 2 Denunciation shall be effected by the deposit of an instrument of denunciation with the Executive Secretary which shall take effect six months after the deposit of such instrument. 3 Within the period of six months following the deposit of an instrument of denunciation, the Member State which has deposited such instrument shall continue to comply with the provisions of this Protocol and shall continue to be bound by its obligations. 4 The Executive Secretary shall inform all signatory States of any denunciation of this Protocol in accordance with paragraph 1. ARTICLE22 AMENDMENTOFTHEPROTOCOL 1 An amendment of this Protocol shall be adopted by a decision of three-quarters of all the Members of the Summit of the Heads of State or Government of SADC. 2 A proposal for the amendment of this Protocol may be made to the Executive Secretary by any Member State for preliminary consideration by the Council, provided, however, that the pro posed 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. ARTICLE 23 SETTLEMENT OF DISPUTES 1 Member States shall endeavour to amicably settle all disputes between them, arising from the interpretation or application of this Protocol by means of negotiation. 2 If the Member States involved in a dispute arising from the interpretation or application of this Protocol cannot find an amicable solution within one month, the dispute shall be referred to an ad hoc working group convened for this purpose or designated by the Committee of Ministers for resolution. Failing attemptsby the ad hoc working group to find a mutually acceptable solution within one month, the dispute shall be referred to the Council of Ministers for resolution. The Council of Ministers shall have two months within which to find a mutually acceptable solution. 3 In the event of no amicable solution being found, the dispute shall be referred to the Tribunal for adjudication in accordance with Article 16 of the Treaty. 28