Lance, if he wanted to get out of his contract because he believed Essendon breached it, he goes to the tribunal, thereby activating this clause. Stop with the pedantic mumbo jumbo. You know what I meant. Besides which, it was touted back in 2013 that the players could get out of their contracts due to the health and safety breaches.
http://www.theage.com.au/afl/afl-news/essendon-players-can-walk-out-experts-20130822-2sekq.html
And, Peter Gordon seemed of the opposite view on radio the other day, that the breach would be difficult to prove. Talked about it quite a bit, but things like Ryder continued to play for 2 years would make his claim difficult. With Slater and Gordon's experience with the thalidomide case. He'd have a solid idea of what he is talking about too.