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the fifth session of the Elaboration of the Convention on the Establishment of the International Organization for Mediation
From 14 to 17 October 2024, the fifth session of the Elaboration of the Convention on the Establishment of the International Organization for Mediation was held in the Hong Kong SAR, China, where delegations successfully concluded the Convention and decided to hold the Signing Ceremony of the Convention in Hong Kong in 2025.
The International Organization for Mediation (IOMed) is the world’s first intergovernmental legal organization dedicated to resolving international disputes through mediation. It will be a key mechanism to apply mediation as a peaceful means to settle international disputes enshrined in the UN Charter with a view to win-win cooperation between the parties, and is of great importance to improving global governance and promoting world peace and the stability of the international order.
Initiated jointly by 19 countries including China, the IOMed is an international public good on the rule of law contributed by developing countries. It will provide mediation services for inter-state disputes, disputes between a State and a national of another State, and international commercial disputes submitted by mutual consent. Leveraging the unique advantages of mediation as a more flexible, cost-effective, convenient and well-implemented means, it offers a new option to all countries for party-owned and efficient resolution of international disputes.
Structure
Subsidiary Institutions or Advisory Bodies
The IOMed may establish such subsidiary institutions or advisory bodies as it deems necessary for the performance and fulfillment of its purposes, objectives and functions.
Governing Council
The Governing Council shall be the decision-making body which shall make policy decisions and set the overall strategy of the IOMed. Its composition, powers and functions, and decision-making are stipulated in the IOMed Convention.
The Governing Council shall be composed of one representative of each Contracting State. An alternate designated by a Contracting State may act as representative in case of his or her principal’s absence from a meeting or inability to act. At each of its annual meetings, the Governing Council shall elect a Chairperson who shall hold office until the election of the next Chairperson. One or more Vice Chairpersons may also be elected, whose term of office shall be the same as that of the Chairperson.
The Governing Council shall:
- adopt its own rules of procedure;
- adopt the administrative and financial regulations of the IOMed;
- adopt the selection and appointment procedure of the Secretary-General and Deputy Secretaries-General;
- adopt the annual budget of revenues and expenditures of the IOMed;
- adopt the rules of procedure for the institution of mediation proceedings;
- adopt the rules of procedure for mediation proceedings;
- adopt the code of conduct for mediators;
- review and approve the annual report on the operation of the IOMed;
- appoint the Secretary-General and Deputy Secretaries-General;
- determine the conditions of service of the Secretary-General and Deputy Secretaries-General;
- establish subsidiary institutions or advisory bodies of the IOMed.
The Governing Council shall also exercise such other powers and perform such other functions as it shall determine to be necessary for the implementation of the provisions of the IOMed Convention.
The Governing Council shall, to the furthest extent possible, operate on the basis of consensus. Each member of the Governing Council shall have one vote. According to the IOMed Convention, in case consensus cannot be reached on a particular matter after every effort has been exhausted, the Governing Council shall move to decide on the matter by a simple or special majority of its members present and voting.
Secretariat
The IOMed Secretariat will carry out the daily operations of the IOMed.
The Secretariat shall consist of the Secretary-General, one or more Deputy Secretaries-General and such other officials and staff as may be considered necessary. The Secretary-General shall be the legal representative and the chief official of the IOMed and shall be responsible for its administration, including the appointment of officials, in accordance with the provisions of the IOMed Convention and the rules and regulations adopted by the Governing Council.
The Secretariat shall be responsible for implementing the decisions of the Governing Council.
The Secretariat shall prepare an annual budget of revenues and expenditures, and an annual report on the operation of the IOMed, for the Governing Council to review and approve.
The Secretariat shall establish channels of communication with the Contracting States.
All the officials and staff of the Secretariat, in the discharge of their offices, owe their duty entirely to the IOMed and to no other authority.
Leadership Team
Professor Teresa Cheng
GBM GBS SC JP
Professor Teresa Cheng graduated from King’s College London with a BSc.(Eng) (1st class) degree in civil engineering and obtained an LLB degree from the University of London. She is a Fellow of King’s College London.
She was the former Secretary for Justice of the Hong Kong Special Administrative Region from January 2018 to June 2022. In Hong Kong SAR, she has served as Chairman of the Financial Dispute Resolution Centre, Hong Kong International Arbitration Centre and various statutory bodies including the Air Transport Licensing Authority, the Environmental Impact Assessment Appeal Board Panel, Town Planning Appeal Board. She also served as member on various advisory bodies to the Government of Hong Kong SAR such as the Construction Industry Council, the Central Policy Unit, Housing Authority, Antiquities Advisory Board. She was the founding Chairperson of the Asian Academy of International Law (AAIL) and was instrumental in introducing the Hong Kong chapter of the China-AALCO Exchange and Research Program since 2017. Professor Cheng also served as a Deputy Judge and Recorder of the Hong Kong SAR. She was awarded the Grand Bauhinia Medal, Gold Bauhinia Star and the Bronze Bauhinia Star in recognition of her exceptional service and contribution to the community. She is also a Justice of Peace.
Internationally, Professor Cheng has served as the Vice-chairman of the Court of Arbitration of the International Chamber of Commerce and the International Council of Commercial Arbitration. In 2008, she was elected as the world-wide President of the Chartered Institute of Arbitrators and was the first Asian female to take that role. She served as a member of the World Bank Sanctions Board. She was the President of the 59th AALCO Annual Session held in 2021. She has also participated in various international professional bodies, for instance as Council Member of the Inter-Pacific Bar Association.
Professor Cheng has vast experience in dispute resolution and has been involved in complex international commercial and international investment cases as counsel, arbitrator and mediator. The international commercial cases she handled include infrastructure projects, mining, clean energy, oil and gas, fashion design and are seated in many jurisdictions around the world. She was a member of the International Centre for Settlement of Investment Disputes (ICSID) Panel of Arbitrators designated by Chairman of ICSID Administrative Council in 2011 and designated by China in 2017. She has sat as arbitrator in investor-state disputes administered by ICSID and the PCA and as member of ad hoc committees in ICSID annulment proceedings.
As Secretary for Justice she was instrumental in setting up the investment mediation training since 2018, with the Department of Justice and AAIL as co-organisers, involving experts from ICSID and UNCITRAL. Academically, she is an Adjunct Professor of Tsinghua University and was the founding course director and now a co-course director of the International Arbitration and Dispute Settlement Program in the School of Law of Tsinghua University.
Dr Sun Jin
Dr Sun Jin served as the Director-General of the International Organization For Mediation Preparatory Office from February 2023 to October 2025, and acted as Chair of all the negotiation sessions on the IOMed Convention. Dr Sun has served in different positions in the Ministry of Foreign Affairs of the People’s Republic of China (“MFA”) since 1996, including the Deputy Director-General of the Department of Treaty and Law, the Special Representative on Climate Change Negotiations of the MFA, and the Deputy Director-General at the Department of International Cooperation of the Supreme People’s Court. Over the years, Dr Sun has led Chinese delegations to participate in numerous bilateral and multilateral treaty negotiations and international conferences.
Dr Sun has possessed the National Lawyer’s Qualification since 1994, and served as an arbitrator of the 6th Beijing International Arbitration Center and a council member and adjunct professor at the Institute of International Law of Wuhan University. Dr Sun obtained a Bachelor of Laws, a Master of Laws and a Doctor of Laws at the Wuhan University, and a Master of Laws from the University of Melbourne.
Dr Sun has published a lot of books and articles including “ Resolving International Disputes through Mediation: Where We Stand, Challenges, and Opportunities Ahead” “The Autonomy of the Arbitration Clause”, “The Declaration Clauses and the Choice of Court Convention”, “Use Rules of International Law to Deal with New Challenges Faced with International Relation”, and “The Hague Judgments Convention and How We Negotiated It”. Dr Sun also participated in the compilation of “Chinese Practice in International Law” and “ISDS Reform Conference Proceedings”, etc.
History




In 2022, China and like-minded countries concluded the Joint Statement on the Future Establishment of the International Organization for Mediation.
On 16 February 2023, the IOMed Preparatory Office was inaugurated in the Hong Kong SAR, China to coordinate the Elaboration of the Convention on the Establishment of the International Organization for Mediation. Dr. Sun Jin serves as Director-General of the Preparatory Office.
In May 2023, the first session of the IOMed Convention Elaboration was held in the Hong Kong SAR. Delegations of States that had signed, endorsed or supported the Joint Statement attended the session, and decided that Dr. Sun Jin would be the Chair of the sessions.
The second to fourth sessions of the Elaboration were held in the Hong Kong SAR and the Macau SAR in October 2023, January 2024 and June 2024.
From 14 to 17 October 2024, the fifth session of the IOMed Convention Elaboration was held in Hong Kong, where delegations successfully concluded the Convention and decided to hold the signing ceremony of the Convention in Hong Kong in 2025.
On 30 May 2025, the Signing Ceremony of the IOMed Convention is held in Hong Kong.
On 29 August 2025, the IOMed Convention enters into force.
On 20 October 2025, the IOMed, headquartered in Hong Kong, China, was inaugurated.
