Well, I think if you read the final text you'll note that it can be amended by the agreement of both parties. That's a clause in the text. I believe that when companies examine this agreement and reflect on its consequences for them, their employees, their shareholders, and the communities in which they operate, they will be there; they will want to be part of this.
The accelerated deposit mechanism is very favourable for companies. I cannot, in my wildest dreams, imagine companies just holding up the agreement as a spiteful act to somehow bring the agreement down.