What consideration will be given to possible ISO2700X certifications in order to demonstrate the implementation that must be done in each case of the PART-IS?

ISO 2700X certification will be considered to comply with the EASA PART-IS Regulation to a large extent. However, the EASA PART-IS Regulation introduces requirements specific to the aviation security context that are not covered by the ISO 2700X certification framework. Guidance material on ISO 2700X certification has been developed within the EASA PART-IS Working Group for Authorities and may be useful to you.