Regional Business Use Cases in the OneNet Project Cluster Preparatory Phase: Cross-SO grid pre-qualification is a Regional Business Use Case developed by the Western Cluster in the OneNet Project. Northern regional flexibility market is a Regional Business Use Case developed by the Northern Cluster in OneNet Project. Aggregated data retrieval and Flexibility market data aggregation are Regional Business Use Cases developed by the Eastern Cluster in OneNet Project. Regional critical infrastructure security awareness information exchange is a Business Use Case developed by the Southern Cluster in the OneNet Project. For information on OneNet’s Business Use Cases, see D2.3: Business Use Cases for the OneNet https://zenodo.org/doi/10.5281/zenodo.5926010.