Supplemental Notice to Market Participants 
Regarding TO Debits and Negative Pricing for Supplemental Energy 
(Tuesday, March 16, 1999) 

On March 9, 1999 The ISO issued a notice to all market participants that the software required to implement the TO Debit solution and negative pricing for Supplemental Energy will be available for use for day ahead scheduling on Tuesday March, 16, 1999 for operating day Wednesday March 17, 1999.  The implementation (or uploading) of the software has been delayed one day.  Consequently, the software required to implement the TO Debit solution and negative pricing for Supplemental Energy will be available for use for day ahead scheduling on Wednesday March, 17, 1999 for operating day Thursday March 18, 1999.