My theory

The release of the BFS is being delayed in order for Teck to scramble for a deal with another player to help fund the regional plan they wnat to exexcute

The Chinese are playing hard ball and Lindsay is seeking other participants

They want this nailed down before they give CUU the Liard interests, which will make CUU, with their Schaft position, and BFS in hand, a possible target for several majors

Teck would had to pre-agree to a very attractive buyout price in order for Elmer to accomodate the delay however

...and would have the cover of delaying the release in the interests of the CUU shareholders