1. Any Contracting State may propose an amendment to the present Convention by submitting it to the Secretary-General. The Secretary-General shall thereupon communicate the proposed amendment to Contracting States.
2. Any proposed amendment to this Convention shall be adopted by the Contracting States by consensus to the furthest extent possible. If consensus cannot be reached after every effort has been exhausted, the amendment shall as a last resort be adopted by a two-thirds majority of Contracting States.
shall enter into force on the thirtieth day after the date of deposit of the third instrument of ratification, acceptance or approval. When an amendment enters into force, it shall be binding on those Contracting States that have expressed consent to be bound by it. Other Contracting States shall still be bound by the provisions of this Convention and any earlier amendments that they have ratified, accepted or approved.
5. When a Contracting State ratifies, accepts or approves an amendment following the deposit of the third instrument of ratification, acceptance or approval, the amendment shall enter into force in respect of that Contracting State on the thirtieth day after the date of the deposit of its instrument of ratification, acceptance or approval.
6. No amendments shall affect the rights and obligations of any party to a dispute arising out of consent to mediation under this Convention given before the date of entry into force of the amendment.