Within the context of the FlexBIT project, Deliverable D1.2-Current Regulatory Framework for Interoperability, provides a comprehensive analysis of the current regulatory framework governing energy communities and interoperability across the European Union. It examines the EU-level legislative landscape, including energy, data governance, and cybersecurity frameworks, and assesses their practical implications for Renewable Energy Communities (RECs) and Citizen Energy Communities (CECs). The report presents a comparative, in-depth review of five Member States, Italy, Germany, Malta, Poland, and Greece, covering legal frameworks, market maturity, permitting processes, financial incentives, digital readiness, and cybersecurity alignment. Particular emphasis is placed on interoperability challenges, data exchange mechanisms, and regulatory gaps affecting collective self-consumption, energy sharing, and flexibility services. Building on this analysis, the deliverable identifies structural barriers and enabling conditions for digitally enabled energy communities and provides evidence-based findings to support the FlexBIT project’s objectives. It establishes a robust regulatory and institutional foundation for the development of interoperable, cyber-secure, and citizen-centric energy community models, informing subsequent technical design, pilot implementation, and policy recommendations.