TO:	ALL CLEARING PARTICIPANTS
FROM:	CLIENT SERVICES AND SUPPORT
DATE:	March 16, 2005
SUBJECT:	Chicago Climate Exchange Margin Rate SFICVD

The following margin interval and spread credit will be effective with the launch of the Sulfur Financial Dioxide Current Vintage Delivery Future:

Chicago Climate Exchange	Margin Interval
Sulfur Financial Dioxide Current Vintage Delivery	$1300

Chicago Climate Exchange	Spread Credits
Sulfur Financial Dioxide Current Vintage Delivery	None

Should you have any questions, please call or e-mail one of the following Client Services and Support Representatives: