Weeramantry does make the distinction between "inter partes" and "erga omnes" cases, I.e "between parties" and "for everyone" cases. These trade treaties, while international generally do not include all nations. But they could and that would be the worst case scenario where global corporate greed has taken legal control of everything.
Even then, though, Weeramarantry's argument for sustainable development would give local courts a legal opening and if we have a massive global movement to back it up, an opening is all we need. So no problem. All we need to do is to build a massive global movement for a Great Transition to a sustainable world! (;-) Let's do it!
#gr8transition #sdgs #un_goals