On February 5, 2007, two important enhancements will be introduced for processing of SLEDS.  The first enhancement pertains to electronically-executed calendar spread trades, 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.