It's possible, but I have my doubts. Certainly Jerry has the right to tell a player in Tank's position what not to do when he leaves the facilities. But I really doubt whether they have any authority to actually enforce such rules. It would be insubordination, but, it's probably completely legal (if not justified) insubordination. But I'm sure there's a clause in his contract for something like that. Contracts can be voided for injuries from other sports played in the players free time. Or motorcycle riding, that kind of thing. I'm not a lawyer, so I don't know all the legalities of it, but I imagine that's the kind of thing they're finding out if they can do.