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

Amendments to the Rules

History of the revisions of the TAO arbitration rules, main changes, concordance table and transitional rules.

Updated : October 28, 2026· 3 min read

A text that evolves with practice

The Victory Banquet: from Battle Scenes of the Quelling of Rebellions in the Western Regions, with Imperial Poems (c. 1765–74; poem dated 1760)
The Victory Banquet: from Battle Scenes of the Quelling of Rebellions in the Western Regions, with Imperial Poems (c. 1765–74; poem dated 1760)

A set of arbitration rules lives with the needs of its users. Since 2011, the TAO has revised it four times to incorporate mediation, the expedited procedure, remote hearings and online filing. Each revision follows a consultation procedure.

This page presents the history of amendments, their rationale and their effects on pending proceedings. A concordance table links each article of one version to that of the next.

Before drafting any clause, check that you have the latest version.

  • Amendments
  • Versions
  • Concordance

Amendments to the Rules in figures

5Versions published
4Revisions
60 dPublic consultation
2024Latest version

Source: Registry of the OIMAP Arbitral Tribunal.

Breakdown

Procedure40%
Digital24%
Mediation18%
Costs18%

Themes of the revisions.

Successive revisions

The 2016 version added the mediation annex and clarified the rules on independence. The 2019 version introduced the expedited procedure and urgent measures. The 2022 revision enshrined remote hearings and electronic exchanges. The 2024 version made online filing general, revised the scale of fees and strengthened transparency in appointments.

Each revision was preceded by a consultation of users: surveys, meetings with bar associations and market operators, written comments.

The Calumny of Apelles, Giorgio Ghisi (1560)
The Calumny of Apelles, Giorgio Ghisi (1560)
Plaque (1500s–1600s)
Plaque (1500s–1600s)
The Antechamber of the Palace of Justice, Paris, Charles Meryon (1855)
The Antechamber of the Palace of Justice, Paris, Charles Meryon (1855)

Revision procedure

A proposal for amendment may come from the council, the Registry, the quality committee or users. A drafting committee prepares a draft, published for consultation for sixty days. The comments are analysed in a public report, then the council adopts the text by a qualified majority.

The new version comes into force on a date announced at least three months in advance. A user guide summarises the changes.

Transitional rules

Requests filed before the entry into force of a new version remain governed by the old one, unless the parties agree otherwise. Arbitration clauses referring to the TAO Rules are understood as referring to the version applicable on the date of the request.

This rule protects predictability: the parties know which rules will apply, while benefiting from improvements for future cases.

Projects in preparation

The drafting committee is currently studying three avenues: a consolidation procedure for multiple disputes, a specific regime for private online sales and transparency rules on third-party funding of disputes. The projects will be submitted for consultation when they are ready.

Users may make their needs known to the Registry at any time. Suggestions are examined each year by the quality committee.

History of versions

Five versions
VersionMain new featuresEntry into force
2011Creation1 January 2011
2016Mediation, independence1 March 2016
2019Expedited procedure, urgency1 September 2019
2022Remote hearings1 June 2022
2024Online filing, new scale of fees1 January 2024

Milestones

  1. Version 1

    38 articles.

  2. Version 2

    50 articles.

  3. Version 3

    56 articles.

  4. Version 4

    60 articles.

  5. Version 5

    62 articles.

Which version applies?

Portrait of John VIII Palaoelogus, Emperor of Constantinople, 1424-1428 (reverse), Pisanello (c. 1438–1439)
Portrait of John VIII Palaoelogus, Emperor of Constantinople, 1424-1428 (reverse), Pisanello (c. 1438–1439)
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)
Seal Color Box (1662–1722)
Seal Color Box (1662–1722)

Old clause or new version

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

Old clause

Drafted before 2019
  • Remains valid
  • Refers to the current version
  • May overlook the expedited procedure

To be revised if possible.

The Dance at the Court of Herod, Israhel van Meckenem (c. 1500)

Recent clause

Drafted after 2022
  • Suited to remote hearings
  • Includes mediation
  • Aligned with the scale of fees

Recommended practice.

Following the amendments

  1. Subscribe

    Registry alert.

  2. Read

    Explanatory note.

  3. Compare

    Concordance table.

  4. Update

    Clauses and models.

  5. Train

    Inform the teams.

Habits to adopt

A scholar

Coronation of the Virgin, Christoffel Jegher (1632–36)
« These Rules evolve at the pace of the market. That is rare: most arbitration texts change only once a decade. »
Pr. Mireille Aubry, professor of law

Vocabulary of revisions

Concordance
Table linking the articles of two versions.
Public consultation
Comment phase before adoption.
Qualified majority
Reinforced voting threshold.
Transitional provision
Rule governing the passage from one version to another.

Frequently asked questions

May I comment on a draft?

Yes, during the consultation.

Do the Rules change often?

Every three to four years.

Do my clauses remain valid?

Yes.

Where can I read the text?

Useful documents

Contacts

Pair of Drawings: Sketch of the Labyrinth of the Villa Pisani  and Piazza San Marco with Doges' Palace, Francesco Guardi (1773–1778(?))
Pair of Drawings: Sketch of the Labyrinth of the Villa Pisani and Piazza San Marco with Doges' Palace, Francesco Guardi (1773–1778(?))
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.

Consult the tribunal reports

The Triumph of Mordecai, Lucas van Leyden (1515)

Activity and studies.

Tribunal reports
Image credits (16)
  • Dr. James Stuart; Mary Campbell Stuart, Gilbert Stuart (c. 1815) — Cleveland Museum of Art, CC0 1.0
  • The Victory Banquet: from Battle Scenes of the Quelling of Rebellions in the Western Regions, with Imperial Poems (c. 1765–74; poem dated 1760) — Cleveland Museum of Art, CC0 1.0
  • The Calumny of Apelles, Giorgio Ghisi (1560) — Cleveland Museum of Art, CC0 1.0
  • Plaque (1500s–1600s) — Cleveland Museum of Art, CC0 1.0
  • The Antechamber of the Palace of Justice, Paris, Charles Meryon (1855) — Cleveland Museum of Art, CC0 1.0
  • Portrait of John VIII Palaoelogus, Emperor of Constantinople, 1424-1428 (reverse), Pisanello (c. 1438–1439) — Cleveland Museum of Art, CC0 1.0
  • Sketches in Belgium and Germany, Volume I: Hall of Justice of the Magistrates du Franc, Bruges, Louis Haghe (1840) — Cleveland Museum of Art, CC0 1.0
  • Seal Color Box (1662–1722) — Cleveland Museum of Art, CC0 1.0
  • The Judgment of Solomon and Esther before Ahasuerus (pair), Dirk Vellert (c. 1530) — Cleveland Museum of Art, CC0 1.0
  • The Dance at the Court of Herod, Israhel van Meckenem (c. 1500) — Cleveland Museum of Art, CC0 1.0
  • Coronation of the Virgin, Christoffel Jegher (1632–36) — Cleveland Museum of Art, CC0 1.0
  • Pair of Drawings: Sketch of the Labyrinth of the Villa Pisani and Piazza San Marco with Doges' Palace, Francesco Guardi (1773–1778(?)) — Cleveland Museum of Art, CC0 1.0
  • Mercury (Budha), from a Mandi Astrology Series, Sanju (c. 1810) — Cleveland Museum of Art, CC0 1.0
  • Chemin de fer de Toulouse à Bayonne. Pont de l'Aran (en trois arches de 17m d'ouverture chacune). Situation des travaux au 21 juillet 1861, Édouard Baldus (1861) — Cleveland Museum of Art, CC0 1.0
  • Sweet Melancholy, Joseph-Marie Vien (1756) — Cleveland Museum of Art, CC0 1.0
  • The Triumph of Mordecai, Lucas van Leyden (1515) — Cleveland Museum of Art, CC0 1.0
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