Go for their own AOC (Air Operators Certificate). They have been piggybacking off other airlines AOCs since they started, first Atlantic Airways and then Flightline. With Flightline gone now, and no other European operator of the 146 likely to want to get involved with Nex (not that there are many left!), their only real option is to try and get their own AOC. Of course to do that you need credible post-holders, which I imagine will be a bit of a problem for them, and a few million Euros (just for the bonds). Knowing the way Irish aviation works, it may be possible to cobble something together, but my guess is that Nex will quietly fold. I hope they can keep going, their CEO has worked pretty hard to keep them afloat, and for a while it was a pretty tight operation. Pretty sure it is just the CEO, an accountant and a portacabin in Waterford now, though...