The schools leaving the ACC would have several colorable and viable arguments of defenses and excuses for non-performance. The doctrines of frustration of purpose, impossibility, and commercial impracticability would hold enough water to create an existential crisis for the ACC.
To preserve the availability of the above defenses, and lessen the exposure for the receiving conferences, neither the B1G nor the SEC would act alone or act first. FSU and Clemson, by
openly expressing their dissatisfaction with the status quo, have enhanced the availability of commercial impracticability for each other, and the other schools in the ACC. Neither conference should extend an invite prior to each school independently requesting an invitation from B1G and the SEC, otherwise they would invite their own exposure. Similar episodes of silence happened prior to Nebraska, then Rutgers and Maryland, and later USC and UCLA joining, which insulated the B1G from exposure to each school's previous conferences. But active discussions were ongoing prior to those departures, as they are now (i.e. between FSU and the B1G). Clemson leaving for the SEC and FSU leaving for the B1G would fundamentally change the value of the television contracts, opening the door to frustration of purpose, impossibility, and commercial impracticability. Regardless, if an early settlement among the ACC and the departing schools isn't reach, lawyers undoubtedly will make colorable arguments that the changes in the broader media landscape themselves have created a situation of commercial impracticability for the ACC's member schools vis a vis their ability to compete with other schools.
The
three page bare bones agreement holding the ACC schools together and allocating media rights now does no favors for the ACC. Much is left to interpretation - and argumentation.
If Clemson requested an invitation from the SEC (potentially with schools like Miami, Virginia Tech and NC State), and FSU requested an invitation from the B1G (potentially with schools like North Carolina, UVA, Georgia Tech and Notre Dame) the defenses to this grant of rights contract are wide open - and all of the relevant parties at the ACC, the B1G and the SEC know it.