Sorry - I should clarify.
If Teck decides to just backin and not buy us out totaly - we can definitely sell to another major. However, we'd be renegotiating the contract (which supercedes the 2002 agreement). We'd be negotiating a JV that we don't want ourselves - and as such may hurt ourselves in negotiating the JV, when whoever we end up selling to (another major) may actually want different terms which may lower the price they want to pay or make them hesitant to pull the trigger.
I'm not saying we wouldn't sell, nor am I saying we'd negotiate a shitty JV - but I am saying that unless we have a second or third buyer in mind already and have talked to them - and know what they would want in a JV, it may end up possibly hurting us to negotiate one that a potential future buyer may not like (or at least not all the clauses that we discuss).