CAISO Notification:  Operations Procedure -  S-310 Inadvertent In	terchange Payback 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:   <>  *	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