Procedural Background

This document is the final Award rendered by a majority of an ICSID tribunal in the arbitration between Watkins Holding S.à.r.l. and other investors (Claimants) and the Kingdom of Spain (Respondent). The dispute, brought under the Energy Charter Treaty (ECT), concerned Claimants' investments in several wind farm projects in Spain and the subsequent radical overhaul of Spain's renewable energy regulatory framework.

Jurisdictional Objections

The Tribunal first addressed Spain's two jurisdictional objections. Unanimously, it rejected the Respondent's intra-EU objection, which argued that the ECT's dispute settlement provisions do not apply to disputes between an investor from one EU Member State and another EU Member State. The Tribunal affirmed that its jurisdiction is founded on public international law, specifically the ECT and the ICSID Convention, which operate in a legal order distinct from that of the European Union. It found no explicit or implicit "disconnection clause" in the ECT that would oust its jurisdiction and held that the Court of Justice of the European Union's decision in *Achmea* was not determinative for this multilateral treaty context.

However, the Tribunal unanimously upheld Spain's second objection concerning the tax carve-out under ECT Article 21. It found that it lacked jurisdiction over claims related to the 7% tax on the value of electricity production (the "TVPEE") introduced by Law 15/2012, as this measure qualified as a *bona fide* taxation measure excluded from the treaty's substantive protections.

Analysis of the Merits

On the merits, a majority of the Tribunal found that Spain had breached its obligation to accord Fair and Equitable Treatment (FET) under ECT Article 10(1). The Tribunal determined that Spain, through its RD 661/2007 regime and subsequent official representations, had created specific commitments and induced legitimate expectations of a stable, predictable, and favorable regulatory framework to attract investment in its renewable energy sector. The Claimants reasonably relied on these commitments when making their substantial investments.

The majority held that the series of legislative and regulatory measures enacted by Spain between 2012 and 2014—culminating in the complete repeal of the RD 661/2007 regime and its replacement with a new, less favorable system based on a "reasonable rate of return"—constituted a fundamental and radical alteration of the legal framework. This overhaul frustrated the Claimants' legitimate expectations and violated the stability inherent in the FET standard. The Tribunal rejected Spain's defense based on its sovereign right to regulate, finding the measures to be unreasonable and disproportionate in light of the specific stability commitments made.

Decision on Quantum and Costs

The majority awarded the Claimants damages in the amount of €77 million for the breach of the ECT. The quantum was determined using a Discounted Cash Flow (DCF) analysis, with the valuation date set at 20 June 2014, when the new regulatory regime was fully implemented and the harm to the investment crystallized. The Tribunal awarded pre-award interest at 1.16% and post-award interest at 2.16%, both compounded monthly. The Claimants' request for a tax gross-up was dismissed. By majority, the Tribunal ordered Spain to pay 75% of the Claimants' costs. Arbitrator Hélène Ruiz Fabri issued a Dissenting Opinion on issues of liability and quantum.