An exchange under (i) above of a currency that is not freely usable shall be made by the member whose cur- rency is purchased unless that member and the purchasing member agree on another procedure. (iv) A member purchasing from the Fund the Inflatable Water Park freely usable cur- rency of another member and wishing to exchange it at the time of purchase for another freely usable currency shall make the exchange with the other member if requested by that member. The exchange shall be made for a freely usable currency selected by the other member at the rate of exchange referred to in (i) above.