Hybrid Models of Mediation and Arbitration: How Med-Arb Works in Principle and Practice

Disclaimer: This article provides general information on court and ADR procedures in Hong Kong. It does not constitute legal advice. Consult a qualified solicitor for advice specific to your case. 本文不構成法律建議。涉及個人案件請諮詢持牌律師。

In July 2025, the Hong Kong International Arbitration Centre (HKIAC) published its updated Administered Arbitration Rules, which for the first time include a dedicated procedural framework for hybrid dispute resolution models. This regulatory development arrives as commercial parties in Hong Kong increasingly demand processes that combine the flexibility of mediation with the finality of arbitration. The 2025 Rules, effective from 1 September 2025, codify what practitioners have long practiced informally: the sequenced or integrated use of mediation and arbitration, commonly known as “med-arb.” This article explains how med-arb works in principle, what the Hong Kong legislation provides, and how parties can structure a med-arb clause in their commercial contracts.

What Med-Arb Is and Why It Matters

Med-arb is a hybrid dispute resolution process where the parties first attempt to settle their dispute through mediation. If mediation fails to resolve all or part of the dispute, the unresolved issues proceed to arbitration. The same neutral may serve as both mediator and arbitrator, or different neutrals may be appointed for each phase. The key structural feature is that the mediation phase is mandatory before arbitration can commence, unless the parties agree otherwise.

The 2025 HKIAC Rules formalise this structure at Article 13A. The rule provides that the arbitral tribunal may, with the parties’ consent, suspend the arbitration proceedings to allow for mediation. The tribunal may also invite the parties to consider mediation at any stage. This codification removes the procedural uncertainty that previously surrounded med-arb under the HKIAC Rules, where parties had to rely on ad hoc agreements or separate institutional mediation rules.

The Hong Kong legal framework supports med-arb through two principal statutes. The Arbitration Ordinance (Cap. 609) at section 32B expressly empowers an arbitrator to act as a mediator with the parties’ written consent. The Mediation Ordinance (Cap. 620) provides the statutory framework for mediation confidentiality and enforceability of settlement agreements. Together, these ordinances create a coherent legal environment for hybrid processes.

The Core Structural Models

Sequential Med-Arb: The Classic Model

The most common med-arb structure is sequential. The parties agree in their contract, or by a separate submission agreement, to mediate first. The mediation phase follows standard mediation procedure: the mediator facilitates negotiations, helps identify interests, and explores settlement options. If the parties reach a settlement, the mediator records it as a binding settlement agreement enforceable under the Mediation Ordinance.

If mediation fails, the dispute proceeds to arbitration. The arbitrator (who may or may not be the same person as the mediator) conducts a full arbitration hearing. The arbitrator renders a binding award enforceable under the Arbitration Ordinance and the New York Convention on the Recognition and Enforcement of Foreign Arbitral Awards.

The critical issue in sequential med-arb is whether the same neutral should serve both roles. The advantage of a single neutral is cost efficiency and continuity. The neutral has already invested time understanding the dispute and the parties’ positions. The disadvantage is the risk of procedural unfairness. During mediation, the neutral may receive confidential information from one party that the other party does not know. If that same neutral later acts as arbitrator, the other party may argue that the arbitrator was biased or that the process violated natural justice.

Hong Kong law addresses this concern directly. Section 32B(4) of the Arbitration Ordinance provides that if an arbitrator acts as a mediator and the mediation fails, no objection may be taken to the arbitrator continuing as arbitrator solely on the ground that the arbitrator had acted as a mediator. However, the arbitrator must disclose to all parties any confidential information obtained during mediation that is material to the arbitration. The parties may also agree in advance to waive any objections based on the mediator’s role.

Dual-Neutral Med-Arb: The Separated Model

An alternative structure uses different neutrals for mediation and arbitration. A mediator conducts the mediation phase. If mediation fails, a separate arbitrator takes over for the arbitration phase. This model eliminates the confidentiality and bias concerns entirely. The mediator never becomes the arbitrator, so no confidential information carries over.

The dual-neutral model is more expensive because two neutrals must be paid. It also requires careful coordination between the mediation and arbitration phases. The parties must agree on the timing of the transition and the scope of issues that the arbitrator will decide. The 2025 HKIAC Rules at Article 13A(3) provide that the tribunal may fix a timetable for mediation and may extend the time for the arbitration proceedings accordingly.

Integrated Med-Arb: The Concurrent Model

A less common but growing model is integrated med-arb, where mediation and arbitration occur simultaneously or in overlapping phases. The neutral may move between mediation and arbitration roles as the dispute evolves. For example, the neutral may mediate on some issues while arbitrating on others. The neutral may also issue a preliminary arbitral award on a discrete legal issue, then mediate the remaining commercial issues.

The Hong Kong courts have recognised the validity of integrated med-arb. In Gao Haiyan v. Keeneye Holdings Ltd (2011), the Court of First Instance considered whether an arbitral award made after a failed mediation attempt should be set aside for apparent bias. The court held that the award should not be set aside, applying a test of whether a fair-minded and informed observer would conclude there was a real possibility of bias. The court found that the parties had consented to the hybrid process and that the mediator-arbitrator had not acted improperly.

Drafting a Med-Arb Clause

Step 1: Choose the Model

The first drafting decision is whether to use a single neutral or dual neutrals. The choice depends on the parties’ tolerance for risk and their cost sensitivity. For high-value, complex disputes where procedural fairness is paramount, dual neutrals are safer. For smaller disputes where cost is a primary concern, a single neutral is more practical.

A sample single-neutral clause might read:

“Any dispute arising out of or in connection with this contract shall first be referred to mediation in accordance with the HKIAC Mediation Rules. The mediator shall be appointed by the HKIAC. If the dispute is not settled within 60 days of the appointment of the mediator, or such longer period as the parties may agree, the dispute shall be referred to arbitration in accordance with the HKIAC Administered Arbitration Rules. The mediator shall serve as the sole arbitrator, and the parties waive any objection to the mediator acting as arbitrator based solely on the mediator’s prior role.”

A sample dual-neutral clause might read:

“Any dispute arising out of or in connection with this contract shall first be referred to mediation in accordance with the HKIAC Mediation Rules. The mediator shall be appointed by the HKIAC. If the dispute is not settled within 60 days of the appointment of the mediator, the dispute shall be referred to arbitration in accordance with the HKIAC Administered Arbitration Rules. The arbitrator shall be a person other than the mediator, appointed by the HKIAC.”

Step 2: Specify the Mediation Timeline

The clause should specify a fixed period for mediation. The HKIAC Mediation Rules provide that the mediation shall be completed within 60 days unless extended. The clause can adopt this default or set a different period. A shorter period, such as 30 days, may be appropriate for urgent disputes. A longer period, such as 90 days, may be appropriate for complex commercial disputes.

Step 3: Address Confidentiality and Waiver

If a single neutral is used, the clause should include an express waiver of any objection based on the mediator’s role. The clause should also address the disclosure of confidential information. The parties may agree that the mediator-arbitrator shall not disclose any information obtained during mediation that is not otherwise disclosed in the arbitration.

Step 4: Choose the Seat and Governing Law

The clause should specify Hong Kong as the seat of arbitration. The Arbitration Ordinance provides a modern, supportive legal framework for arbitration. The Hong Kong courts have consistently upheld arbitral awards and have shown a willingness to enforce hybrid processes. The clause should also specify the governing law of the contract.

Practical Considerations for Parties

Cost and Time Efficiency

Med-arb can be more cost-effective than pure arbitration because a successful mediation avoids the full arbitration hearing. Even if mediation fails, the mediation phase often narrows the issues in dispute, reducing the time and cost of the subsequent arbitration. The 2025 HKIAC Rules at Article 13A(4) provide that the costs of the mediation phase may be treated as costs of the arbitration, giving the tribunal flexibility in allocating costs.

Enforceability of Awards

A med-arb award is enforceable under the same legal framework as a standard arbitration award. The Arbitration Ordinance at section 73 provides that an arbitral award is final and binding on the parties. The New York Convention applies to awards made in Hong Kong, giving them international enforceability. The risk of a challenge to a med-arb award is low if the process was properly structured and the parties gave informed consent.

Confidentiality

The Mediation Ordinance at section 8 provides that mediation communications are confidential and may not be disclosed except in limited circumstances. The Arbitration Ordinance at section 18 provides that arbitration proceedings are confidential unless the parties agree otherwise. In a med-arb process, the mediation phase is confidential under the Mediation Ordinance, and the arbitration phase is confidential under the Arbitration Ordinance. The parties should ensure that the confidentiality provisions in their mediation and arbitration agreements are consistent.

Key Takeaways

1. The 2025 HKIAC Administered Arbitration Rules at Article 13A provide a formal procedural framework for med-arb, making it easier for parties to adopt this hybrid model in their commercial contracts.

2. Section 32B of the Arbitration Ordinance (Cap. 609) expressly permits an arbitrator to act as a mediator with the parties’ written consent, and section 32B(4) provides that no objection may be taken solely on the ground of the dual role.

3. The choice between a single neutral and dual neutrals depends on the parties’ risk tolerance and cost sensitivity; a single neutral is more cost-efficient but carries a risk of procedural challenge, while dual neutrals eliminate that risk at higher cost.

4. A well-drafted med-arb clause should specify the mediation timeline, address confidentiality and waiver of objections, and choose Hong Kong as the seat of arbitration to benefit from the supportive legal framework.

5. A med-arb award is enforceable under the New York Convention and the Arbitration Ordinance, provided the parties gave informed consent and the process was conducted fairly.