International commercial disputes rarely rest on the judgment of a single decision-maker. Once the amount in controversy is substantial, or the legal and factual issues cut across jurisdictions, parties increasingly prefer a three-person panel to a sole arbitrator. In American arbitration practice, from ICDR-administered proceedings seated in New York to AAA and ad hoc arbitrations conducted in Houston or Washington, D.C., serving as a member of arbitral tribunal USA carries a distinct set of responsibilities, separate from those of a sole arbitrator or a mediator. Understanding this role helps parties appreciate why tribunal composition is one of the most consequential procedural decisions in any arbitration agreement.
How a Three-Member Tribunal Is Formed
The standard model under institutional rules such as those of the AAA, the ICDR and the ICC allows each party to nominate one arbitrator, with the two party-nominated members then agreeing on a third, who chairs the tribunal and presides over hearings and procedural orders. Where the co-arbitrators cannot agree, the administering institution steps in to appoint the chair. Once constituted, every member of the tribunal, whether nominated by a party or appointed by an institution, owes the same duties of independence and impartiality to both sides; nomination by a party does not create any obligation of loyalty to that party.
Core Duties Once Appointed
Foremost among these duties is disclosure. An arbitrator must reveal, at the point of approach and continuously thereafter, any relationship, professional engagement or financial interest that could reasonably call independence into question. This obligation does not end with appointment; it continues through the life of the case, since circumstances disclosed and accepted at the outset cannot later be used to challenge the eventual award. Alongside disclosure, a tribunal member must treat both parties with procedural equality, give each a genuine opportunity to be heard, deliberate confidentially with fellow arbitrators, and contribute to a reasoned award that can withstand scrutiny on any subsequent enforcement or set-aside application under the Federal Arbitration Act or the New York Convention. Where the tribunal cannot reach unanimity, a majority decision generally suffices, though a dissenting member may record a separate opinion.
Why the Role Varies by Sector
The substantive demands on a tribunal member shift considerably depending on the industry involved. In a US-seated energy dispute arbitrator appointment, for instance, a panel member is expected to navigate FERC-regulated tariff disputes, LNG export contracts and joint operating agreements, where technical evidence on pricing formulas and force majeure often outweighs pure contract interpretation. The tribunal’s task is to synthesise this technical record into findings the co-arbitrators can test and ultimately agree upon.
In financial-sector proceedings, a banking and bank documents dispute arbitrator sitting as a tribunal member must be comfortable with letters of credit, trade-finance documentation and the standards that govern financial institutions operating across borders, since these disputes frequently turn on documentary compliance rather than broader questions of fault.
Commodity trade disputes place still different demands on the panel. A commodity dispute arbitrator serving alongside co-arbitrators in a US-seated matter must weigh market conventions, price-adjustment mechanisms and delivery obligations under contracts that often incorporate GAFTA, FOSFA or comparable trade-association terms, requiring the tribunal to apply industry practice alongside the governing law.
Construction and infrastructure matters are similarly specialised. A construction dispute arbitrator on a three-member panel is routinely called upon to assess delay and disruption claims, multi-party contractual structures and completion-risk allocation on projects such as LNG terminals or transport infrastructure, where the tribunal’s reasoned findings on quantum and causation are frequently the most contested part of the eventual award.
A Collaborative but Independent Function
What unites these varied engagements is the essentially collaborative, yet individually accountable, nature of tribunal service. Each member studies the record independently, tests the other arbitrators’ reasoning in deliberation, and signs an award for which all three bear personal responsibility. For parties structuring a US-seated arbitration clause, and for practitioners weighing whether to accept an appointment, that combination of independent judgment and collective decision-making is precisely what distinguishes tribunal membership from sitting as a sole arbitrator — and why the choice of each panel member deserves careful attention from the outset.
