In accordance with the Core Principles of the Commodity Exchange Act, Exchange rules require a customer type indicator ("CTI") code on every transaction executed electronically or by open outcry. Recently, the Exchanges and the National Futures Association met and agreed on a harmonized set of CTI code definitions for the industry. This notice discusses how the new definitions will be applied to CME and CBOT products. Clearing firms may need to make some system changes to apply the new definitions accurately. CBOT and CME are requesting that firms fully apply the new CTI definitions no later than December 1, 2004. Exchange representatives will be available to address any questions regarding the new definitions at the Clearing Advisory Group meeting to be held at CME on October 27, 2004, at 9:30 a.m.

Please view the attached Regulatory Advisory RA-04-13 for more details.

Thank you.