I was looking at old posts and I think we got that answer from Spitfire:

Correction once again, I looked further back in my emails...I had forgotten I had emailed Elmer about CuuWinner’s Laird claim....he responded this way 

 (The 4 year notice to Liard is correct, Copper Fox have make Teck aware of this and as a participating partner in Schaft Creek Joint Venture it would be in Copper Fox’s best interest to have an up to date economic assessment completed on the Schaft Creek project. Copper Fox is not going to agree with a notice to Liard unless the assessment meet industry standards. If positive this would benefit Copper Fox.)

This is kind of important guys! Pretty huge imo