What / how do the FAA, CAA etc define spin recovery techniques and therefore what defines the unconventional spin recovery which the CAA then prohibit intentional spinning??
The "standard spin recovery" - that is what we try to make work first is that in AC23-8 isn't it?
The aeroplane in question has a "stick released" spin recovery - not unique, but unusual and presumably means that there was some reason not to use the "standard" recovery. The prohibition appears to be a decision by the manufacturer, so far as I can see from the documentation I have, rather than an external imposition.
Presumably neither CAA nor FAA felt any urge to try and impose clearances against the desires of the manufacturer. That at-least is totally understandable.
G