On the basis of Para 1, it does kind of sort of look like they would qualify
Why could a club from the area not participate? If TT didn't exist...
But that's not the point - the point is that they could if they were good enough. Which is why I asked about the terms of TT's participation in the Federation league - if part of those terms is that clubs from Taranaki forego any pretension towards participating in the Central League, then that would open the door for TT. But it seems a fairly forced way of doing it.