Schaft Creek Option

Just read this:

• The option agreement has a time-limited back-in right exercisable by Teck Cominco within up to 120 days of the delivery of the positive feasibility study. If the back-in right is not exercised, and at Teck Cominco's option, CFM shall grant Teck Cominco a 1% net smelter royalty or, if CFM has assigned the option agreement to a public company whose shares are listed on a recognized stock exchange, shares of that company having a value of $1,000,000.

If Teck Cominco wishes to exercise its back-in right, it may earn;

• a 20% interest by matching prior incurred expenditures, or it may earn;
• a 40% interest by matching three times prior incurred expenditures, or it may earn
• a 75% interest by incurring four times prior expenditures and arranging all production financing.

Does this mean that if Teck doesn't back-in for 75%, they will not have to finance CF's part?

Would this not be another motivator for Teck not take 75%?