The text of this ExPaNDS Guidance Note is extracted from ExPaNDS deliverable D2.3: Final data policy framework for Photon and Neutron RIs. The Guidance Note covers the 21 elements that comprise the final version of the ExPaNDS data policy framework. These elements fall under nine broad themes: General drivers and principles Roles and responsibilities Scope Enabling FAIR data Necessary restrictions to data sharing Availability of infrastructure and responsibility for costs Data management planning requirements Recognition and reward for data usage Reporting requirements, compliance monitoring, and any possible sanctions The Guidance Note is intended as a short-form, ready-access tool for policy makers working on data policy within Photon and Neutron Research Infrastructures. For additional context around the development of the ExPaNDS data policy framework, see the D2.3 deliverable and its earlier, draft version D2.1: Draft extended data policy framework for photon and neutron RIs.