If they don't come down on this now, it's an invitation to every team to circumvent any rule by any means possible. In fact, they'll have an obligation to do so if they want to be competitive for their fans as the league will have tacitly set the expectation that they will account for every exception in the language of every rule in the rulebook.
Or, they can slam them hard for simply being in violation of the rules and, almost magically, they will not be in violation of rules going forward.
My children pull this garbage on me all the time. Each one saying they didn't do anything wrong and that it was the other guy that did it or they didn't know. When that happens, they both go in plank position while they debate with each other who was really responsible. This is how I help them resolve disputes. Amazingly, we get solutions to common brotherly disputes in my house in less than two minutes per dispute because neither of them can hold a plank longer than that. And then next time, when they argue and I offer to help them sort it out, they both say 'no thanks, dad, we got it covered.'
And they somehow magically do.