TO:	ALL CLEARING PARTICIPANTS
FROM:	CLIENT SERVICES AND SUPPORT
DATE:	February 26, 2007
SUBJECT:	Chicago Climate Exchange Margin Rate Change for Expiration Month.

The following margin intervals are effective close of business February 26, 2007.

Contract	From	To
March 2007 Sulfur Dioxide	$975	$1,475

The following margin intervals are effective close of business February 28, 2007.

Contract	From	To
March 2007 Nitrogen Financial	$550	$825

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