Where does that right come from? What is the contractual basis...

Where does that right come from? What is the contractual basis of that right, and why do you think that right is likely to still exist and to supersede the terms of yesterday's announcement, which set out the proportions on which each set of shareholders will hold in the combined entity?

To be clear, are you saying you think Orocobre and Toyota agreed to a term whereby Toyota will always have a right to bring its ownership up to 15%? And if so, how do you think they have the right to do that? (eg do you think they have a right to call for Orocobre to issue more capital at any given time? Do they have options?)

I suspect what has happened here is you have read something and have badly misunderstood it. Please set out here the terms upon which you think that right arises and why you've formed that view, and I can hopefully help you out.