ARTICLE 22: CO-OPERATION WITH OTHER STATES, MEMBER STATES AND ORGANISATIONS 1. State Parties shall endeavour to obtain the assistance and co-operation of other states and organisations in achieving the objectives of this Protocol. 2. State Parties shall, where appropriate, co-operate with other Member States that are not party to this Protocol. ARTICLE 23: SETTLEMENT OF DISPUTES Any dispute arising from the interpretation or application of this Protocol, which cannot be settled amicably, shall be referred to the Tribunal. ARTICLE 24: AMENDMENTS 1. Any State Party may propose amendments to this Protocol. 2. Proposals for amendments to this Protocol may be made to the Executive Secretary who shall duly notify all Member States of the proposed amendments at least thirty (30) days in advance of consideration of the amendment of the State Parties, but such period of notice may be waived by the Member States. 3. Amendments to this Protocol shall be adopted by a decision of three quarters of all the State Parties and shall become effective thirty (30) days after such adoption. ARTICLE 25: SIGNATURE This Protocol shall be signed by the duly authorised representatives of the Member States. ARTICLE 26: RATIFICATION This Protocol shall be subject to ratification by the signatory States in accordance with their respective constitutional procedures. ARTICLE 27: ENTRY INTO FORCE This Protocol shall enter into force thirty days after the deposit of instruments of ratification by two-thirds of the Member States. ARTICLE 28: ACCESSION This Protocol shall remain open for accession by any Member State. ARTICLE 29: WITHDRAWAL a. Any State Party may withdraw from this Protocol upon the expiry of twelve (12) months from the date of giving the Executive Secretary a written notice to that effect. b. Any State Party that has withdrawn pursuant to paragraph 1 of this Article shall cease to enjoy all rights and benefits under this Protocol upon the withdrawal becoming effective but shall remain bound by the obligations under this