Instead of picking on you for the questions. I'm going to give you the answer.
FIRST - The importance of June 4th is based on the NR on Feb 4th that the FS study has been sent to Teck. A lot of the posters here figured that June 4th is the final day where Teck has to make a decision based on the 120 days timeline in the back in agreement.
Now...CUU AND management has not said ANYTHING in relation to June 4th or provide us with a deadline. From the last NR, all we know is that the two parties should be in neogtiations about SC and CUU answering all the questions Teck has.
So when June 4th comes and nothing happens, don't hold a gun to anybody here, don't start ranting saying management screwd us etc etc. Official NR has not mentioned anything. If you want to know further, try calling CUU.