GMG is not deciding not to sell H-fuel. In fact, they still are selling H-fuel, Kusari is trying to stop them, but has yet to succeed in that. To say that GMG is not selling any H-fuel right now is complete crap Casero, and you know it.
Now, since GMG is not deciding not to sell H-fuel, it's an external group forcing it on them, GMG is in no way violating their contract.
International law sides with GMG on this one, not IC.