I don't want to go to far with this but my concern is that the MOC explicitely acknowledges the possibility that an environmental permit may be denied. VZ never promised or guaranteed an environmental permit. Countries around the globe routinely grant or deny permits sometimes offering no reason at all for their decisions. Does not issuing the permit actually constitute abrogation given that it is an outcome that was forseen as a possibility in the MOC itself?

I'm not so sure.