From an ETSO authorization perspective, it must be demonstrated that the military embedded functions do not interfere with the CS-ETSO functions. EASA will not investigate the military functions. Moreover, if there are some restrictions regarding access to design data for the military functions, EASA cannot offer any special guarantee for the special access and protection of military data. So far, there has been some case by case arrangements in order to delegate the technical investigation to NAAs which can offer resources that comply with military requirements for special data access and protection.
If the article is designed exclusively for military use, EASA is not legally competent to issue an approval.