The services from the EU Cybersecurity Reserve should serve to support national authorities in providing assistance to affected entities operating in sectors of high criticality or to affected entities operating in other critical sectors (as listed in Annex I and Annex II of the NIS2 Directive) as a complement to their own actions at national level. The services from the EU Cybersecurity Reserve should also be able to serve to support Union institutions, bodies, offices and agencies, under similar conditions.