Anchoring Sustainable Development in the UNIDROIT–ICC Instrument on International Investment Contracts

The International Institute for Sustainable Development (IISD) calls for broad stakeholder engagement in the public consultation of the draft UNIDROIT–ICC Instrument on International Investment Contracts, running from June 24 to September 15, 2026. IISD argues that the final instrument must prioritize sustainable development over traditional investor protections, transforming aspirational sustainability commitments into binding obligations and avoiding open-ended protection standards typical of old-generation investment treaties.

• The UNIDROIT–ICC project aims to modernize and standardize international investment contracts (IICs) through principles and model clauses, with a final version expected by the end of 2026.
• The public consultation period, open from June 24 to September 15, 2026, is critical for legitimacy as the draft was previously developed primarily within a Working Group of private lawyers and academics.
• The draft Instrument includes sustainability building blocks such as life cycle due diligence, model clauses on investor obligations (covering human rights, climate, and social commitments), and remedies for non-compliance.
• IISD argues that the draft currently relies too heavily on aspirational or best-efforts language for sustainability commitments and should instead use binding obligations, especially where international standards exist.
• There is a potential conflict between the draft's goal of embedding sustainability and its aim to provide investor protections functionally comparable to those in traditional international investment agreements (IIAs) and bilateral investment treaties (BITs).
• The draft contains several contentious protection standards, including stabilization clauses, protection against indirect expropriation, and principles related to 'fair and equitable treatment' such as protection against arbitrary and unreasonable conduct.
• IISD suggests that the Working Group align the Instrument with UNIDROIT’s Sustainable Development Workstream under its Centenary Work Programme to improve coherence and structure.

APA

International Institute for Sustainable Development (2026). Anchoring Sustainable Development in the UNIDROIT–ICC Instrument on International Investment Contracts. https://www.iisd.org/system/files/2026-07/sustainable-development-unidroit-icc-investment-contracts.pdf

Chicago

International Institute for Sustainable Development. Anchoring Sustainable Development in the UNIDROIT–ICC Instrument on International Investment Contracts. 2026. https://www.iisd.org/system/files/2026-07/sustainable-development-unidroit-icc-investment-contracts.pdf.

Wikipedia

{{cite report |author=International Institute for Sustainable Development |title=Anchoring Sustainable Development in the UNIDROIT–ICC Instrument on International Investment Contracts |date=July 2026 |url=https://www.iisd.org/system/files/2026-07/sustainable-development-unidroit-icc-investment-contracts.pdf |access-date=17 August 2026 |via=Climate Insights Directory}}

BibTeX

@techreport{internationalinstituteforsustainabledevelopment2026anchoring, author = {{International Institute for Sustainable Development}}, title = {{Anchoring Sustainable Development in the UNIDROIT–ICC Instrument on International Investment Contracts}}, institution = {International Institute for Sustainable Development}, year = {2026}, month = jul, url = {https://www.iisd.org/system/files/2026-07/sustainable-development-unidroit-icc-investment-contracts.pdf}, urldate = {2026-08-17}, note = {Indexed by Climate Insights Directory} }