Eiser Infrastructure Limited and Energía Solar Luxembourg S.à r.l. v. Kingdom of Spain

Background: Eiser Infrastructure Ltd. and Eiser Solar Luxembourg (Eiser) made investments in three thermosolar power plants in Spain in 2007, following the introduction of a highly favorable renewable energy support program under Royal Decree (RD) 661/2007 (para. 108). This decree established generous feed-in tariffs, particularly for photovoltaic (PV) energy, with rates set at EUR 440/MWh under the 2007 regulatory framework. The implementation of RD 661/2007 attracted numerous investors in the PV energy sector, including Eiser (para. 117). However, Spain had not foreseen the surge in solar energy developers eager to take advantage of these incentives, leading to an oversupply of electricity in the grid. A major shortcoming of the Spanish regulatory framework was the absence of a cap on the capacity eligible for the feed-in tariff system, which placed a significant financial strain on the government. The situation worsened with the onset of the global financial crisis in 2008, prompting the Spanish government to introduce legislative measures that reduced and retroactively altered the support mechanisms for PV energy. Between 2012 and 2014, the most significant regulatory changes affecting PV energy producers, including Eiser, were implemented. The Spanish Parliament enacted Law 15/2012, which imposed a 7 percent tax on all energy producers. Further reforms followed in July 2013 with Royal Decree Law (RDL) 9/2013, which repealed RD 661/2007 and effectively dismantled the fixed tariff system. As a result, PV energy producers were only able to generate revenue by selling electricity at market prices (para. 146). The final termination of the RD 661/2007 framework came with the enactment of Ministerial Order IET/1045/2014, which established a new compensation scheme for renewable energy plants (para. 147). According to Eiser, by the end of 2014, the value of its investment had dropped to EUR 4 million, a stark contrast to the EUR 125 million initially invested in the development of the PV power plants (para. 154). Merits: I. Legitimate expectations for a stable legal framework Eiser contended that its decision to invest in Spain was primarily influenced by RD 661/2007. However, it argued that Spain’s later decision to replace the 2007 regulatory framework with a new structure based on different principles undermined its legitimate expectations, which were protected under the Energy Charter Treaty (ECT). As a result, Eiser claimed that the value of its investment suffered a significant reduction. Spain, on the other hand, countered that investors could not reasonably expect the 2007 framework to remain unchanged or immune to modification. Moreover, Spain asserted that it had never made explicit commitments or assurances to Eiser that would give rise to legitimate expectations protected by the ECT. The tribunal acknowledged that states retain the authority to regulate and adjust legal frameworks as circumstances evolve. It also clarified that the fair and equitable treatment (FET) standard does not grant investors an absolute right to regulatory stability (para. 362). Nonetheless, the tribunal found that the ECT protected Eiser from the kind of fundamental and unreasonable regulatory overhaul that had occurred in this case (para. 363). It further noted that Eiser, as a sophisticated and experienced investor, should have been aware that regulatory frameworks for utilities are subject to adjustments—but within reasonable limits (para. 364). To support its conclusions, the tribunal distinguished the present case from Charanne, in which the tribunal was not required to assess the implications of RDL 9/2013. As a result, the Charanne tribunal examined regulatory changes that were more limited in scope and had far less severe economic repercussions (para. 369). Additionally, the Eiser tribunal referenced various arbitral decisions under the ECT that emphasized the obligation of host states to maintain a “stable and transparent legal framework” for foreign investors. This obligation, according to the tribunal, was derived from both the treaty’s preamble and a preceding political document (paras. 377–380). The tribunal also found that the extensive nature of Spain’s regulatory changes could constitute a breach of the FET standard. Finally, it highlighted that the complete transformation of the regulatory framework and the substantial financial losses suffered by investors were crucial considerations in its ruling. In conclusion, the tribunal established that under Article 10(1) of the ECT, Eiser had a legitimate expectation that Spain would not abruptly and drastically alter the regulatory framework in a way that would effectively destroy the value of its investment. However, the tribunal determined that this was precisely the outcome of RDL 9/2013, and the subsequent regulatory measures implemented by Spain (para. 387). The tribunal ultimately ruled that Spain had breached the FET standard by frustrating Eiser’s legitimate expectations, leading to an award of EUR 128 million in damages to the investor. Damages and Compensation Awarded: The tribunal awarded 128.00 mln EUR (139.80 mln USD) Follow on Proceedings- Annulment: I. Annulment Proceedings The Decision on Annulment concerns Spain’s application to annul an arbitral award. The Committee's deliberations focused on Spain's allegations that the arbitral tribunal was improperly constituted (Article 52(1)(a) of the ICSID Convention) and that there was a serious departure from a fundamental rule of procedure (Article 52(1)(d)) 2 3 4. These claims were largely based on the alleged lack of independence and impartiality of one of the arbitrators, Dr. Stanimir Alexandrov, particularly concerning his relationship with the Brattle Group, an expert entity involved in the original arbitration, and his failure to disclose this relationship. In its process, the Committee made several key determinations: it affirmed that the independence and impartiality of arbitrators are essential for the integrity of arbitral proceedings and the legitimacy of the award; it concluded that Spain had not waived its right to raise objections regarding Dr. Alexandrov's independence and impartiality, as the relevant facts allegedly became known only after the award was rendered; and it established that the standard for assessing such a challenge is whether a reasonable third party would find an "evident or obvious appearance of lack of impartiality." Ultimately, the Committee decided to annul the Award due to the improper constitution of the Tribunal and a serious departure from a fundamental rule of procedure. For costs, the Committee decided they would be allocated based on the "costs follow the event" principle, meaning the unsuccessful party generally bears the costs.