Can you rely on a clause that you breached?
As my contracts professor used to say, “you can’t suck and blow at the same time”. What he meant was that you cannot seek to enforce some parts of a contract while simultaneously breaching others. That is what happened to Rand A Technology Corporation in a recent case: they breached the termination clause in the employment contract by paying less than they were required to but, when the employee complained, they tried to rely on that same termination clause to limit their liability. They lost.