Good morning Vasileios
Like Grégoire and Dominique, the reminder is appreciated.
In Spain, apart from the use of 27k, since 2010 we have had the National Security Scheme as a working framework to which the ANSP are obliged to comply https://ens.ccn.cni.es/es/
To a large extent, the requirements of the ENS and the Part-IS are traceable as well as those of the 27k, although I do not know how EASA has assessed the internal legislations of the EU member countries. Is there any validation plan for these frameworks by AESA to validate compliance with Part-IS?