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

Overview of the legal framework

The architecture of the art market's rules: conventions, directives, national law and case law, and their relationships.

Updated : October 28, 2026· 3 min read

An edifice of five floors

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)

The legal framework of the art market can be pictured as a five-storey building: conventions, directives, national law, case law and good practices. Each storey rests on the one before.

This page describes each of them, shows how the rules apply to a concrete operation and recalls the five common principles that run through all the texts.

It serves as a starting point before consulting the detailed pages devoted to each convention, each directive and each sector regime.

  • Overview
  • Hierarchy
  • Principles

Breakdown

Prevention of trafficking30%
Restitution and recourse25%
Transparency25%
Protection of acquirers20%

Objectives pursued by all the texts together.

The five floors

The conventions set the principles. The OIMAP directives break them down into obligations. National law completes them with sanctions and procedures. Case law, finally, clarifies their interpretation, while good practices ease their application.

An operator who reads only one floor is almost always mistaken: a prohibition in international law without the procedure of national law remains theoretical, and a good practice without a legal basis binds no one.

Dr. James Stuart; Mary Campbell Stuart, Gilbert Stuart (c. 1815)
Dr. James Stuart; Mary Campbell Stuart, Gilbert Stuart (c. 1815)
Seal Color Box (1662–1722)
Seal Color Box (1662–1722)
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 five common principles

Five principles recur in all the texts. The first is lawfulness: one sells only what one may lawfully sell. The second is traceability: each work has a history that must be capable of being reconstructed. The third is due diligence: one checks before acting.

The fourth is transparency: one declares, records and keeps. The fifth is the protection of good faith: the acquirer who checked seriously is not sacrificed, but the one who did not try to find out is not protected.

OIMAP's role in the edifice

OIMAP is not a global legislator. It provides a framework of harmonisation that its Member States adopt freely: its directives are negotiated by the Assembly, then transposed. This method is slower than a regulation, but it respects national legal traditions.

The Secretariat supports this transposition through recommendations, training and a published annual follow-up. The Arbitral Tribunal, finally, offers a means of settlement for disputes that find no solution before national courts.

The five floors and their effect

Five floors
FloorNatureEffect for the operator
ConventionsTreatiesSet the principles and prohibitions
OIMAP directivesTexts of the organisationCreate the common obligations
National lawLaws and regulationsSet sanctions and procedures
Case lawCourt and arbitration decisionsClarify interpretation
Good practicesGuides and templatesEase application

Landmarks

  1. Qualify the work

    Cultural property, ordinary work, protected object.

  2. Identify the States

    Departure, transit, arrival.

  3. Apply the texts

    Conventions, directives, national law.

  4. Check

    Due diligence and documents.

  5. Keep

    Records for ten years.

A text does not apply alone

The Triumph of Mordecai, Lucas van Leyden (1515)
The Triumph of Mordecai, Lucas van Leyden (1515)
The Judgment of Solomon and Esther before Ahasuerus (pair), Dirk Vellert (c. 1530)
The Judgment of Solomon and Esther before Ahasuerus (pair), Dirk Vellert (c. 1530)
The Dance at the Court of Herod, Israhel van Meckenem (c. 1500)
The Dance at the Court of Herod, Israhel van Meckenem (c. 1500)

Applying the framework to an operation

  1. Qualify

    Determine the nature of the work.

  2. Locate

    Identify the States concerned.

  3. Search

    Find the applicable texts.

  4. Check

    Carry out due diligence.

  5. Decide

    Conclude or give up.

Points to check

A law professor

Coronation of the Virgin, Christoffel Jegher (1632–36)
« The law of the art market is a law of networks: no text can be understood without the others. »
Prof. Anne-Laure Dufour, professor of international law

Basic vocabulary

Cultural property
Object protected because of its historical or artistic interest.
Lawfulness
Compliance with the law.
Good faith
Legitimate ignorance of a defect.
Case law
All court decisions taken together.

Frequently asked questions

Where do I start?

With the Legal framework page, then with the convention that concerns your case.

Do arbitral decisions constitute case law?

They are published and inspire later decisions: see the case law.

Can States go further?

Yes, the texts set minimums.

Whom should I ask to interpret in case of doubt?

The Legal Affairs Department.

Useful documents

Contacts

A Palace with an Arched Bridge (A Roman Villa), Hubert Robert (1760)
A Palace with an Arched Bridge (A Roman Villa), Hubert Robert (1760)
Legal Affairs DepartmentParis — Headquarters+33 1 00 00 02 00juridique@oimap.exampleMonday to Friday, 9 am – 5 pm

See the consolidated texts

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)

The up-to-date versions of the main texts.

Consolidated texts
Image credits (16)
  • The Calumny of Apelles, Giorgio Ghisi (1560) — 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
  • Dr. James Stuart; Mary Campbell Stuart, Gilbert Stuart (c. 1815) — Cleveland Museum of Art, CC0 1.0
  • Seal Color Box (1662–1722) — 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
  • Portrait of John VIII Palaoelogus, Emperor of Constantinople, 1424-1428 (reverse), Pisanello (c. 1438–1439) — 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
  • The Triumph of Mordecai, Lucas van Leyden (1515) — 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
  • A Palace with an Arched Bridge (A Roman Villa), Hubert Robert (1760) — Cleveland Museum of Art, CC0 1.0
  • Fish or Seal Club (X’ús’) (late 1800s–early 1900s) — Cleveland Museum of Art, CC0 1.0
  • Letter Box, Ogata Kōrin (1700s) — Cleveland Museum of Art, CC0 1.0
  • Hours of Queen Isabella the Catholic, Queen of Spain, Master of the First Prayerbook of Maximillian (c. 1500) — 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
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