Contributory Fault under International Law: A Gateway for Human Rights in ISDS?

The intersection between foreign investment and human rights is gaining attention, as is evident from an increasing number of investment treaty awards analysing legal issues relating to human rights. In the recent International Centre for the Settlement of Investment Disputes (ICSID) arbitration of Bear Creek v Peru, Philippe Sands QC posited, in a dissenting opinion, that the investor’s contribution to events—ie protests against its allegedly adverse environmental impact and disregard of indigenous rights, namely resulting from its ‘inability to obtain a “social licence”’—which led to the unlawful expropriation of its investment, was ‘significant and material’. He further noted that the investor’s ‘responsibilities are no less than those of the government’ and found that damages should thus be reduced. Last year, the Netherlands adopted a new model bilateral investment treaty (BIT), which allows tribunals to ‘take into account non-compliance by the investor with the UN Guiding Principles on Business and Human Rights and the OECD Guidelines for Multinational Enterprises’ when assessing damages. These recent developments shed light on how states and tribunals, as part of their decision-making process, can take into account human rights in practice, and crucially in respect of damages analyses. By first dissecting the concept of contributory fault, then shedding light on the intersection of investment treaty law and human rights, as elucidated in recent jurisprudence, this article questions whether there now exists a gateway for human rights obligations (soft or hard) in the investment treaty arbitration realm through the concept of contributory fault.