I imagine that this would depend in large part on the language of the media contracts (broadcast partners may have a say) but hypothetically, if the ACC could, why would they? Why would the school request this unless they would be moving to greener pastures? If they were, logically wouldn't this make the ACC a lesser product? Beyond that, this would set a precedent that could be potentially very dangerous as one of the schools that really does want out could apply for the same deal shortly after the first was completed.