The UNIDROIT Principles 2004 consist of the Preamble (1994 version, with the addition of paragraphs 4 and 6 as well as the footnote) and 185 articles divided into ten chapters, namely Chapter 1: “General Provisions” (1994 version, with the addition of Arts. 1.8 and 1.12); Chapter 2, Section 1: “Formation” (1994 version) and Section 2: “Authority of Agents” (new); Chapter 3: “Validity” (1994 version); Chapter 4: “Interpretation” (1994 version); Chapter 5, Section 1: “Content” (1994 version, with the addition of Art. 5.1.9) and Section 2: “Third Party Rights” (new); Chapter 6, Section 1: “Performance in General” (1994 version) and Section 2: “Hardship” (1994 version); Chapter 7, Section 1: “Non-performance in General” (1994 version), Section 2: “Right to Performance” (1994 version), Section 3: “Termination” (1994 version) and Section 4: “Damages” (1994 version); Chapter 8: “Set-off” (new); Chapter 9, Section 1: “Assignment of Rights” (new), Section 2: “Transfer of Obligations” (new) and Section 3: “Assignment of Contracts” (new); Chapter 10: “Limitation Periods” (new).

The UNIDROIT Principles 2004 have been formally endorsed by UNCITRAL at its fortieth session (2007).

Members of the Working Group for the UNIDROIT Principles of International Commercial Contracts 2004

Preparatory work on the UNIDROIT Principles of International Commercial Contracts 2004

Official language versions of the UNIDROIT Principles of International Commercial Contracts 2004 (integral version): English , French , Italian and Spanish.

Official language versions of the UNIDROIT Principles of International Commercial Contracts 2004 (black letter rules): English , French , German , Italian and Spanish .

The printed version of the UNIDROIT Principles of International Commercial Contracts 2004 (integral version) is available in the following official languages of UNIDROIT - English, French, Italian and Spanish - as well as in Arabic, Chinese, Farsi , Korean, Portuguese, Romanian, Russian and Vietnamese.