The integration of sustainable development goals in the international sales contracts of biofuels highlights a new role for international contract law. This article examines how the substantive rules of the UN Convention on International Sale of Goods (CISG) may contribute to the implementation of sustainable development and the applicability of the “sustainability clauses.” The contracting parties, including the final buyers of a global supply chain have the right to demand enforcement of these contractual clauses. However, the CISG is limited as to the legal effects international contracts have for third-parties that benefit or are interested in the sustainable development of biofuels. In this context, the contractual tool used in the international trade of sustainable products becomes not only useful but also indispensable.
