To open a contract through CME you would have to put up an initial dollar amount that has been higher then the amount required to maintain that position should the trade move against you. Now CME will require a 1 to 1 ratio so the initial dollar amount you put up to enter the contract will also be the same to maintain the contract.
I would speculate it is ALL underlying contracts. Old and new. The issue is...does it apply to short as well as long positions. If so,...theoretically,.........equilibrium will determine the net direction.