if Teck elects to proceed to earn-back 75% they may, if in their sole opinion they deem warranted, make a decision to place the property into commercial production by constructing a mine and related infrastructure.

Wasn't aware of that option

But as a practical matter, it seems far fetched

First, I am not sure what the CUU(or assign) controlled JV would be doing while Teck was building a mult-billion dollar mine...in 4 years or they loose their interest

If they would like to negotiate from there, I think Elmer could handle it