スペインにおける再生可能エネルギー支援：EU法とエネルギー憲章条約

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🔬研究者:比較法・投資仲裁と気候政策の交差領域で、規制変更リスクの法的評価枠組みを学べる。

🏢実務担当者:再エネ事業の制度変更・仲裁リスクを開示や投資判断にどう織り込むかの示唆を得られる。

🏛政策担当者:支援制度の入札設計と移行措置において、予見可能性と法的審査可能性を確保する重要性を確認できる。

Abstract Spain's experience with renewable energy support provides a useful case for examining how administrative law can preserve the State's capacity to adapt economic policy and control the uncertainty generated by regulatory change in long term investment. This article analyses the evolution of Spanish renewable support as a form of public economic intervention through three successive models: the tariff and premium regime established by Royal Decree 661/2007, the specific remuneration system introduced by the reforms of 2013 and 2014, and the Renewable Energy Economic Regime (REER), under which support is allocated through competitive procedures. The study uses doctrinal legal analysis, complemented by comparative examination, to identify how the design and implementation of support schemes redistribute regulatory risk across Spanish law, European Union law and investment arbitration. The analysis shows that renewable auctions change the way in which administrative intervention is exercised because public authorities retain responsibility for the legal design and administration of the award process. The predictability of the support scheme therefore depends in part on whether those decisions rest on identifiable criteria and remain subject to effective legal review. The study also shows that validity under Spanish law, European Union State aid control and international investment responsibility address different legal questions, so the same regulatory reform may continue to produce legal consequences across separate proceedings. The Spanish arbitrations under the Energy Charter Treaty illustrate how the assessment of regulatory change depends on the facts and legal commitments surrounding each investment. The disputes involving energy projects in Türkiye and the Kyrgyz Republic add a project level perspective by showing that deficient administrative conduct during implementation may itself generate international legal risk. The analysis of renewable auctions, distinct forms of legal control and project level administrative risk supports a broader conception of regulatory stability based on the successive decisions adopted throughout the life of a support scheme. The withdrawal of Spain and the European Union reduces the future role of the Energy Charter Treaty, and disputes concerning earlier investments may continue to produce legal consequences at the payment and enforcement stages, as illustrated by the Commission measures concerning Antin and JGC. Regulatory stability should therefore be assessed by reference to the legal and factual basis existing when each decision is adopted, so that reform rests on contemporaneous justification, transitional treatment reflects verifiable differences between affected investments and evidence generated during implementation informs later regulatory decisions. Under this temporal approach, renewable support can adapt to technological and economic change, with each regulatory decision remaining capable of reconstruction and legal review.

• Zenodo https://zenodo.org/records/23662919first seen 2026-10-29 04:15:15