How to establish other possible modes (or alternative means of compliance) to the permissible modes (or acceptable means of compliance) developed in the ITEs and GUIs?

If an inspected data subject establishes another possible mode (or alternative means of compliance) to the permissible mode (or acceptable means of compliance), developed in an ITE or GUI, it shall demonstrate that its alternative has and maintains a level of safety comparable to that of the permissible mode. To this end, it is recommended that the interested party carry out an analysis or risk management, preferably the framework of its Safety Management System (SGS), which demonstrates such equivalence. In the corresponding process, AESA will assess the proposed alternative compliance mode, and if it is finally compliant, it can be implemented. 
 
If express approval by EASA is required, see standard administrative approval procedure.