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:  M-403 Balancing Energy and Ex-Post Pricing
Version: 3.9
Effective Date: 12/12/2001
Procedure Purpose: The Grid Resource Coordinator (GRC) utilizes the BEEP
(Balancing Energy Ex Post Pricing) Scheduling Software Application to
dispatch resources for real-time imbalances between actual Load and
Generation, and Scheduled Load and Generation.  BEEP selects the most
economic resource available to restore deficient Regulation and Operating
Reserves, as necessary, to maintain system reliability in accordance with
WSCC and NERC criteria.
Summary of changes: 
 <<M-403 v3.9 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.

Please e-mail any comments or questions to the 'Procedure Control Desk'
mailbox [mailto:procctrldesk@caiso.com] and we will respond as soon as
possible.

Thank you!

California ISO Procedure Control Desk



Client Relations Communications.0921
CRCommunications@caiso.com