Observe · Regulate · Protect — since 2007. 19th OIMAP General Assembly: Singapore, 10–12 June 2026. Programme
Arbitration

Appointment of arbitrators

How arbitrators are appointed: agreement of the parties, list, declaration of independence, challenge and replacement.

Updated : October 28, 2026· 3 min read

The decisive moment

Sketches in Belgium and Germany, Volume I: Hall of Justice of the Magistrates du Franc, Bruges, Louis Haghe (1840)
Sketches in Belgium and Germany, Volume I: Hall of Justice of the Magistrates du Franc, Bruges, Louis Haghe (1840)

The appointment of arbitrators is one of the decisive moments of the procedure. It determines the quality of the proceedings and the acceptability of the award. The Rules organise the procedure to guarantee both the parties' freedom and the independence of the tribunal.

In a panel of three arbitrators, each party nominates one arbitrator, and the two arbitrators so appointed choose the president. Failing agreement, the tribunal's council appoints.

This page describes the stages, the time limits, the declaration of independence, challenge and replacement.

  • Appointment
  • Challenge
  • President

Appointment of arbitrators in figures

30 dTime limit for appointment
15 dTime limit for objection
88%Appointments from the list
3%Challenges

Source: Registry of the OIMAP Arbitral Tribunal.

Breakdown

Choice of the parties74%
Appointment by the council19%
Joint agreement on the president7%

Method of appointment.

The stages of appointment

The claimant nominates its arbitrator in the request, the respondent in its answer. The Registry forwards the nominations, collects the declarations of independence and gives the parties fifteen days to raise objections. The council confirms the appointments.

The president of the panel is chosen by the two arbitrators, after consulting the parties, within thirty days. For a sole arbitrator, the parties agree; failing that, the council appoints.

Portrait of Sandford Peacocke, William Wood (1801)
Portrait of Sandford Peacocke, William Wood (1801)
A Lady Reading, Francis Seymour Haden (1833–1910)
A Lady Reading, Francis Seymour Haden (1833–1910)
Portrait Head of a Noble or Official (175–200 CE)
Portrait Head of a Noble or Official (175–200 CE)

Declaration of independence and challenge

Every arbitrator must declare, before confirmation, any circumstance that might raise doubts about independence: professional, financial or personal links, recent appointment by one of the parties, participation in a related case. This obligation continues until the award.

A party may request the challenge of an arbitrator if it has legitimate doubts. The council rules after hearing the arbitrator and the parties. The request must be made within fifteen days of the disclosure of the ground.

Replacement and vacancy

If an arbitrator dies, resigns, is challenged or is durably prevented from sitting, he or she is replaced under the initial procedure. The tribunal decides, after hearing the parties, whether the acts already carried out are maintained.

To avoid delaying tactics, the resignation of an arbitrator at a late stage is strictly controlled. The parties may agree to continue the proceedings with the two remaining arbitrators in certain cases, with the council's agreement.

Arbitrators' fees

Fees are set by the tribunal according to the scale and taking account of time spent, complexity and the amount in dispute. The parties do not negotiate directly with the arbitrators. This rule prevents any pressure on independence.

An arbitrator may request a supplement if the case takes on unforeseen scale; the Registry informs the parties, who may contest.

Appointment timetable

Five stages
StageTime limitActor
Nomination of arbitratorsRequest and answerParties
DeclarationsWithin 7 daysArbitrators
Objections15 daysParties
Choice of the president30 daysArbitrators
ConfirmationWithin 5 daysCouncil

Milestones

  1. Requête

    Proposal.

  2. Answer

    Proposal.

  3. Declarations

    Independence.

  4. Objections

    Period closed.

  5. Tribunal constituted

    President chosen.

Disclose without delay

The Antechamber of the Palace of Justice, Paris, Charles Meryon (1855)
The Antechamber of the Palace of Justice, Paris, Charles Meryon (1855)
Portrait of Georges Arnold Fitzwilliam, Charles Balthazar Julien Fevret de Saint-Mémin (c. 1790–1852)
Portrait of Georges Arnold Fitzwilliam, Charles Balthazar Julien Fevret de Saint-Mémin (c. 1790–1852)
Bookplate:  Boylston Medical Library, George Girdler Smith (1806–39)
Bookplate: Boylston Medical Library, George Girdler Smith (1806–39)

Appointment by the parties or by the council

Portrait of a Man, Italian Painter

By the parties

Freedom of choice
  • Trust
  • Adaptation to the dispute
  • Thirty-day time limit

Preferred method.

The Judgment of Solomon and Esther before Ahasuerus (pair), Dirk Vellert (c. 1530)

By the council

Failing agreement
  • Speed
  • Neutrality
  • Less buy-in

Fallback solution.

Appointing an arbitrator

  1. Choose

    Directory.

  2. Contact

    Through the Registry.

  3. Propose

    In the request.

  4. Wait

    Declaration.

  5. Confirm

    Validation by the council.

Points to watch

A registrar

Portrait Bust of a Man (27 BCE–14 CE)
« Nine times out of ten, the appointment goes without difficulty. On the tenth, a forgotten declaration can cost months. »
Me Hélène Roux, deputy registrar

Vocabulary of appointment

Challenge
Request to remove an arbitrator.
Confirmation
Validation by the council.
President of the panel
Third arbitrator.
Vacancy
Arbitrator's post left open.

Frequently asked questions

May I choose my arbitrator?

Yes.

Who chooses the president?

The two arbitrators.

Can it be contested?

Within fifteen days.

Where can I see the list?

Useful documents

Contacts

Architectural Conference (c. 1622)
Architectural Conference (c. 1622)
Registry of the Arbitral Tribunal (TAO)Paris — Head Office+33 1 00 00 04 00greffe.tao@oimap.exampleMonday to Friday, 9 a.m. – 5 p.m.

See the stages of the procedure

High Class Students and Teachers at Bishop Cotton School, Shimla (verso), Raja Deen Dayal (c. 1882–87)

After the appointment.

Stages
Image credits (16)
▲