No so fast. Over in the BizAviation forum someone posted the original version of the proposed bill. The important bit for non-Italians is this:
13. (aeromobili) È istituita l’imposta erariale sugli aeromobili privati, di cui all’articolo 744 del codice della navigazione, immatricolati nel registro aeronautico nazionale, nelle seguenti misure annuali
My bold.
This means it affects only I-registered a/c.
Not to say this isn't madness and the typical European reaction to this self-made crisis (i.e. more taxes), but from a touring POV a non-event.
PS: original post
here