I'm going to be honest but I think that you have no reason to accept this application.
The applicant does not even play in the server he is applying for which gives me the feeling that he just wants his rights back and if he ever manages to get them back, then he will probably start playing again and be active.
I mean, you should not apply if you are not active. If you don't even play in the server, why do you even bother to start application when you know that you won't be a necessary addition at all? You were probably accepted in the past but let's not forget that you did not complete your trial period and that the actual Head Admin is not the one who accepted you at this time which basically means that you must convince the actual Head Admin and prove him what you are capable of.
Anyway, this is just my opinion.
Cheers.