1. The participating Union entities or public sector bodies shall ensure, where the operation of the interoperability regulatory sandbox requires the processing of personal data or otherwise falls under the supervisory remit of other national, regional or local authorities providing or supporting access to data, that national data protection authorities as well as other national, regional or local authorities are associated with the operation of the interoperability regulatory sandbox. As appropriate, participants may allow for the involvement in the interoperability regulatory sandbox of other GovTech actors such as national or European standardisation organisations, notified bodies, research and experimentation labs, innovation hubs, and companies wishing to test innovative interoperability solutions, in particular SMEs and start-ups.