SWTT,
The "negotiations" with CASA (and predecessors) so that RAOz (ne.AUF) aircraft can operate in "CTA" actually pre-date the formation of CASA, and have made no real progress in all that time.
All it needs is the training package and rating agreed to.
As for the "airworthiness" issues, that is just another unjustified smokescreen, which is not risk based, but prejudice based.
Tootle pip!!