Issue conflict is one of the more difficult forms of arbitrator challenge because the alleged conflict does not necessarily arise from any relationship with a party. Instead, the concern is that an arbitrator may already be committed to a view on a legal or factual issue that is central to the dispute.
That distinction matters. Experienced arbitrators are appointed precisely because they have expertise, and expertise normally includes prior views. International arbitration would be unworkable if every article, award or lecture on a relevant subject disqualified its author. The challenge begins only when prior views, conduct or overlapping roles create a reasonable appearance that the arbitrator may no longer approach the issue with an open mind.
What Is Issue Conflict?
In its pure form, issue conflict is a form of alleged lack of impartiality. The arbitrator may be entirely independent of the parties but appear predisposed toward a legal or factual issue that lies at the core of the arbitration. The risk is not dependence; it is prejudgment.
A useful way to distinguish the concepts is this: a conventional conflict of interest asks whether the arbitrator has a relevant connection to a person or entity; issue conflict asks whether the arbitrator has a relevant commitment to a position.
Issue Conflict Is Not the Same as Expertise
The fact that an arbitrator has written about a subject or decided a similar point before is normally insufficient. The IBA Guidelines recognise this explicitly. Under the 2024 Green List, an arbitrator’s previously expressed legal opinion on an issue that also arises in the arbitration is generally not problematic where the opinion is not focused on the case. The concern becomes more serious when the expression is case-specific, unusually categorical, or reinforced by other circumstances suggesting that the arbitrator’s view is fixed.
The challenge therefore lies in drawing a line between legitimate intellectual consistency and impermissible prejudgment. That line is fact-sensitive and often depends on wording, timing, factual overlap and the existence of additional evidence.
Four Recurring Forms of Issue Conflict
1. Academic writings and prior legal opinions
Arbitrators frequently publish articles, books and lectures. These materials can become relevant if they address the precise issue before the tribunal and appear to demonstrate a settled position. The most important question is usually not whether the arbitrator has an opinion, but whether the surrounding evidence suggests that the opinion is resistant to argument in the current case.
2. Prior decisions or participation in similar proceedings
A second category involves an arbitrator who has already decided, or is simultaneously deciding, a similar dispute. The risk becomes more concrete where the earlier and current cases share the same or closely connected parties, the same legal issue, and materially overlapping facts. Prior exposure to evidence that will reappear in the new case can be particularly significant.
3. Statements or conduct relating to the pending arbitration
Public comments on a pending dispute are more sensitive than abstract academic views. The 2024 IBA Orange List includes the situation where an arbitrator has publicly advocated a position on the case, including through a paper, speech, social media or online professional platform. Challenges in Canfor and Perenco illustrate why strong case-specific language can create an appearance of prejudgment.
4. Role conflict or double-hatting
Issue conflict may also arise where an arbitrator simultaneously acts in another professional role, such as counsel, and the two matters involve the same legal issue. The concern is that the arbitrator may have an incentive to shape one decision in a way that assists a client or position advanced elsewhere. Telekom Malaysia and Blue Bank are leading examples of role conflict interacting with issue conflict.
Issue Conflict vs. Lack of Independence
Not every challenge labelled “issue conflict” is genuinely about an issue. Multiple appointments by the same party or counsel, financial relationships, or law-firm links may primarily concern independence or party-related bias. Treating every such circumstance as issue conflict can obscure the real legal question and the evidence required.
The distinction is useful strategically. If the alleged concern is a relationship with a party, the challenge should identify the relationship and its significance. If the alleged concern is prejudgment of an issue, the challenge should identify the exact issue and the evidence showing a fixed predisposition. Some cases involve both, but the two theories should not be conflated.
How the IBA Guidelines Treat Issue-Conflict Situations
The 2024 IBA Guidelines do not create a single category called “issue conflict”. Instead, relevant situations appear across the Application Lists. Three provisions are particularly useful:
- Orange List 3.1.5: the arbitrator currently serves, or has served within the past three years, as arbitrator or counsel in another arbitration on a related issue or matter involving one of the parties or an affiliate.
- Orange List 3.4.2: the arbitrator has publicly advocated a position on the case.
- Green List 4.1.1: the arbitrator has previously expressed a legal opinion on an issue that also arises in the arbitration, provided the opinion is not focused on the case.
These examples show the underlying distinction. A general legal opinion is ordinarily compatible with arbitral service. Case-focused advocacy or a materially overlapping role can be more serious. The General Standards remain controlling, so circumstances not expressly listed may still create justifiable doubts.
Investment Arbitration and Commercial Arbitration
Most published issue-conflict decisions come from investment arbitration because the decisions are more accessible and the pool of frequently appointed arbitrators has historically been relatively concentrated. This does not mean that issue conflict is limited to investor-State disputes. Earlier commercial arbitration cases, including decisions of French courts and Telekom Malaysia, demonstrate that the same concerns can arise in commercial disputes.
Issue conflict may be particularly relevant in specialised sectors where the pool of available arbitrators is small and the same legal or technical issues recur, such as construction, energy, intellectual property or technology disputes.
A Practical Test
When evaluating a possible issue conflict, the following questions are useful:
- What exact legal or factual issue is said to have been prejudged?
- Is that issue material to the current dispute, or merely background?
- What did the arbitrator actually say or decide, and how categorical was the language?
- Was the prior statement general, or was it focused on the current case or a materially identical dispute?
- Are the parties, facts and applicable legal provisions materially overlapping?
- Did the arbitrator previously receive evidence that may be relevant in the current case?
- Is there an overlapping professional role that creates an incentive to maintain a particular position?
- Do the circumstances, taken together, create justifiable doubts from the viewpoint of a reasonable and informed third person?
Conclusion
Issue conflict is best understood as a problem of apparent prejudgment, not as a prohibition on expertise. Prior views are an inevitable part of appointing experienced arbitrators. A challenge becomes plausible when the evidence moves beyond ordinary professional experience and shows a concrete risk that a material issue has effectively been decided in advance. The strongest cases rely on context, specificity and cumulative evidence rather than the mere existence of a prior opinion.
Selected authorities
- CC/Devas (Mauritius) Ltd. and others v. Republic of India, PCA Case No. 2013-09, Decision on Challenge (30 September 2013).
- Caratube International Oil Company LLP and Devincci Salah Hourani v. Kazakhstan (II), ICSID Case No. ARB/13/13, Decision on Disqualification (20 March 2014).
- Republic of Ghana v. Telekom Malaysia Berhad, District Court of The Hague (18 October 2004).
- Blue Bank International & Trust (Barbados) Ltd. v. Venezuela, ICSID Case No. ARB/12/20, Decision on Disqualification (12 November 2013).
- Perenco Ecuador Limited v. Ecuador, ICSID Case No. ARB/08/6, Decision on Challenge (8 December 2009).
