Gap Between Legal Framework and Market Reality for Demand-Side Flexibility in CEE Demand Side Flexibility in V4 Countries FLEX4CEE – Stromflexibilität für ein stabiles Energiesystem in Mittel- und Osteuropa Frank Bold Society z.s. Slovak Association of Sustainable Energy (SAPI) Instrat Foundation REKK Foundation for Regional Policy Co-operation in Energy and Infrastructure (REKK Foundation)