Guideline 4: Information exchange between ESAs and competent authorities in the context of their respective cooperation with competent authorities designated or established in accordance with NIS2 (NIS2 authorities) (para. 4.1)

4.1 Where possible, competent authorities and the Lead Overseer should make available to each other relevant information stemming from their dialogue with NIS2 authorities responsible for the supervision of essential or important entities subject to that Directive, which have been designated as a critical ICT third-party service provider.