The article addresses how the obligation not to frustrate legitimate expectations has been interpreted and applied in recent investment disputes arising out of amendments in domestic regimes in the renewable energies sector. The analysis will address cases against Czechia, Italy and Spain, the Countries currently facing the majority of disputes for alleged breaches of the Energy Charter Treaty. Jurisdictional issues related to the case law at hand, such as those stemming from intra-EU arbitration, will not be addressed. The contribution is divided in three parts, next to the introduction. First, the notion of legitimate expectations will be analysed. Second, the Czech, Italian and Spanish cases will be addressed, briefly sketching the respective domestic legal frameworks. As a conclusion, it will be suggested that tribunals have considered the fact that a State is exercising its regulatory power, and a potential lack of investors’ due diligence, in diminishing the quantum of compensation, and that such case law adds to the establishment of general “interpretative elements” of FET.

该文章阐述了如何在不破坏合法期望的义务的基础上，对可再生能源领域国内制度的修订所引起的近期投资纠纷进行解释和适用。该分析将解决针对捷克共和国，意大利和西班牙的案件，这两个国家目前因涉嫌违反《能源宪章条约》而面临多数争议。与手头的判例法有关的司法问题，例如欧盟内部仲裁产生的司法问题，将不予解决。除引言外，该贡献分为三个部分。首先，将分析合法期望的概念。其次，将处理捷克，意大利和西班牙的案件，简要概述各自的国内法律框架。作为结论，FET。