Mine life calculations can't include inferred resources. Given the geology and the drill results it's a safe bet that the inferred resources can be converted to indicated with several new drill holes. So mine life is easily beyond 25 years. There's also a strong possibility of expanding the resource in the existing licensed areas. I don't recall a single drill hole failling to hit economic grades and they haven't bothered to perform any new step out drilling... it's really irrelevant since they can perform that when they start thinking about expanding production to 2+ mtpy, which won't happen until they get close to reaching 1 mtpy.

With all the water, they can always buy Yara's licenses or whomever happens to own FED's licenses these days. Although in the latter case, the more likely scenario would seem to be let the owners of FED go bankrupt or give up and scoop it up at that point.