Market Participants:

Please assure that this Notification is forwarded to your respective
Operating Departments ---

Notification of Operating Procedure Update

*	The following new or revised ISO Operating Procedures have been
implemented and are posted for reference on the ISO Website.

ISO Operating Procedure posted:  S-310 Inadvertent Interchange Payback
Version: 2.0
Effective Date: 10/01/2001
Procedure Purpose: This Operating Procedure defines the process for ISO
Inadvertent Interchange Payback.
Summary of changes: 

 <<S-310 v2.0 Procedure Change Description Form.doc>> 

*	Please find them at
http://www1.caiso.com/thegrid/operations/opsdoc/index.html under the
appropriate Operating Procedure section heading.

If you have any questions, please e-mail the 'Procedure Control Desk'
mailbox [mailto:procctrldesk@caiso.com] and we will respond as soon as
possible.

Thank-You,

Operations Support and Training