On Monday, February 5, 2007, important enhancements will be introduced for processing of SLEDS and CBOT FLEX Matching System. The first enhancement pertains to electronically-executed calendar spread trades that are SLEDS eligible, and will allow users to specify for each order routed to e-cbot or GLOBEX whether leg prices should be engine-assigned or based upon the previous-day's settlement prices. The second enhancement pertains to pit-executed spreads, and will allow users to submit or change front leg prices at any valid tick, regardless of match status. The third enhancement involve changing the CBOT FLEX system from allocate claim model to a two sided matching system.

See notice link for more details.http://www.cme.com../files/Chadv-06-295.pdf

To prepare for this launch, firms are invited to participate in testing these enhancements in clearing beginning Tuesday, January 16, 2007 through Friday, January 26, 2007.  For the electronically executed calendar spreads, in the initial phase, testing will be limited to e-cbot trades only. CME GLOBEX sleds testing will be included in the second phase of firms testing and will be conducted in the Certification environment starting Wednesday, January 31, 2007.

All tests will be conducted in the CME End to End test region where users can view trades in Front End Clearing Quality Assurance via the Portal. Test dates fall on the actual calendar days. For example, Tuesday’s January 16, 2007 will use trade date 1/16.