Conduct detrimental to the league. There has to be a clause in there somewhere, right?
Edit: maybe this,
A Member (a “Withdrawing Member”) may Withdraw, or shall be deemed to have Withdrawn, as a Member of the Conference: (ii) if a Supermajority of Disinterested Directors by affirmative vote determines that such Member: (D) otherwise takes or fails to take actions that are determined by a Supermajority of Disinterested Directors to be contrary to the best interests of the Conference taken as a whole.