In an era of rapid digital transformation, public administrations must navigate complex regulatory landscapes while fostering innovation. The European Union’s Interoperable Europe Act (IEA) introduces interoperability regulatory sandboxes—controlled environments that allow public sector authorities to experiment with new digital solutions before full-scale implementation. This course provides a comprehensive overview of regulatory sandboxes, distinguishing them from similar experimental frameworks such as living labs, testbeds, and traditional sandboxes. Participants will explore the role of interoperability sandboxes in overcoming legal and technical barriers to innovation.