An offtake agreement can take any form it could be for a specific period of time, for a set price, for some market set price, maybe lowered by some percentage. An offtake agreement is simply a contract so there will not be any set form. As to whether ZEN will or will not develop a mine this is immaterial. Companies can always enter into contracts even if they don't expect to be the one to fulfull them. They could simply pass along the obligation to a buyer. So in my opinion there may be likely ways to procees but there are still many possibiliites.