1. RMS Update to TAC October 2, 2008

2. RMS Update to TAC TAC Confirmation Vote Request Kyle Patrick of Reliant Energy and Independent Power Marketer segment representative elected by unanimous vote to be RMS Vice-Chair for remainder of 2008 service term.

3. RMS Update to TAC September 10 RMS Meeting Summary: September 10 RMS Meeting Summary: Reviewed 2008 Market Participant Survey Action Plan Reviewed 2008 Market Participant Survey Action Plan Clarification from ERCOT requested Clarification from ERCOT requested Will review open items at 10/15 RMS meeting Will review open items at 10/15 RMS meeting Will provide recommendations to TAC in November Will provide recommendations to TAC in November Credit Risk Standard Consideration Credit Risk Standard Consideration Document still in flux, subsequent review by CWG and WMS was still pending Document still in flux, subsequent review by CWG and WMS was still pending RMS did not take recommendation vote but gained new understanding of the reporting tool RMS did not take recommendation vote but gained new understanding of the reporting tool

4. RMS Update to TAC September 10 RMS Voting Items: September 10 RMS Voting Items: Test Plan Flight Schedule Revision for 2008 Test Plan Flight Schedule Revision for 2008 Approved 2 week extension for Flight 1008 Approved 2 week extension for Flight 1008 Test Plan Schedule for 2009 Test Plan Schedule for 2009 Approved Working Group Recommendation Approved Working Group Recommendation http://www.ercot.com/content/meetings/rms/keydocs/200 8/0910/BackgroundMaterial.2009_Flight_Schedule.doc

5. RMS Update to TAC RMGRR062, AMIT Requested Change to Letter of Authorization Response – Withdrawn RMGRR062, AMIT Requested Change to Letter of Authorization Response – Withdrawn RMS Approved RMS Approved RMGRR065, Update to RMG Section 7.6 Disconnect and Reconnect for Non- Payment RMGRR065, Update to RMG Section 7.6 Disconnect and Reconnect for Non- Payment RMGRR066, Safety Net Move-In Process RMGRR066, Safety Net Move-In Process Both are pending ERCOT Impact Analysis and Cost Benefit Analysis Both are pending ERCOT Impact Analysis and Cost Benefit Analysis

6. RMS Update to TAC Market Advanced Readings and Settlement Task Force (MARS TF) Market Advanced Readings and Settlement Task Force (MARS TF) Scope: Scope: MARS Taskforce will accommodate market stakeholders in review of the Advanced Metering Implementation Team (AMIT) interim solution (PRR 766) documentation, which includes Distributed Generation premises with provisioned advanced meters, and the taskforce will conduct subsequent meetings to discuss any outstanding questions or business requirement issues as they are identified. MARS Taskforce will accommodate market stakeholders in review of the Advanced Metering Implementation Team (AMIT) interim solution (PRR 766) documentation, which includes Distributed Generation premises with provisioned advanced meters, and the taskforce will conduct subsequent meetings to discuss any outstanding questions or business requirement issues as they are identified.PRR 766PRR 766 Objectives: Objectives: MARS Taskforce will provide input into the detailed business requirements and assumptions. MARS Taskforce will provide input into the detailed business requirements and assumptions. MARS Taskforce will facilitate the resolution of all issues related to business requirements of the interim solution. MARS Taskforce will facilitate the resolution of all issues related to business requirements of the interim solution.

7. RMS Update to TAC MARS Task Force Issues to Address: MARS Task Force Issues to Address: Start/Stop time on Move-ins/Move-outs Start/Stop time on Move-ins/Move-outs Billing impacts Billing impacts Settlement and data extract impact Settlement and data extract impact Communication process of 15 minute data from TDSP to ERCOT Communication process of 15 minute data from TDSP to ERCOT DRG with Advanced metering communication, settlement and data extract DRG with Advanced metering communication, settlement and data extract

8. RMS Update to TAC MARS Issue # 1 MARS Issue # 1 Retail market NIDR 867_03 (Final) stop date vs. IDR 867_03 (Final) stop date used to complete a service order and the impacts of the difference when using Advanced Meter data in settlement. Retail market NIDR 867_03 (Final) stop date vs. IDR 867_03 (Final) stop date used to complete a service order and the impacts of the difference when using Advanced Meter data in settlement. How the REP of Record (ROR) history is maintained for ESI IDs with Advanced meters? How the REP of Record (ROR) history is maintained for ESI IDs with Advanced meters? How/what usage is used in settlement and what is affiliated with the 810? How/what usage is used in settlement and what is affiliated with the 810?

9. RMS Update to TAC MARS Recommendation for Issue #1: MARS Recommendation for Issue #1: In order for the Interim Settlement Solution to be supported by mid to late 2009 MARS recommends that ERCOT be allowed to continue their current processes for Non-IDR 867_03 Final transactions, this would mean: In order for the Interim Settlement Solution to be supported by mid to late 2009 MARS recommends that ERCOT be allowed to continue their current processes for Non-IDR 867_03 Final transactions, this would mean: NIDR 867_03 Finals (F) will continue to be used to complete service orders and maintain the REP history. Therefore, ERCOT will continue to stop the REP history with the day prior to the date received in the 867_03F at 23:59:59. NIDR 867_03 Finals (F) will continue to be used to complete service orders and maintain the REP history. Therefore, ERCOT will continue to stop the REP history with the day prior to the date received in the 867_03F at 23:59:59. For the Long-Term Settlement Solution of Advanced Meters MARS recommends that this issue be thoroughly vetted by the Advanced Metering Implementation Team (AMIT) and Market Stakeholders for the appropriate market resolution. For the Long-Term Settlement Solution of Advanced Meters MARS recommends that this issue be thoroughly vetted by the Advanced Metering Implementation Team (AMIT) and Market Stakeholders for the appropriate market resolution.

10. RMS Update to TAC MARS Task Force MARS Task Force Next Meeting is October 8 Next Meeting is October 8 Website: Website: http://www.ercot.com/committees/board/t ac/rms/marstf/ http://www.ercot.com/committees/board/t ac/rms/marstf/ http://www.ercot.com/committees/board/t ac/rms/marstf/ http://www.ercot.com/committees/board/t ac/rms/marstf/ Group email distribution list: Group email distribution list: MARS@lists.ercot.com/ MARS@lists.ercot.com/ MARS@lists.ercot.com/

11. RMS Update to TAC ERCOT 2009 SLA Update ERCOT 2009 SLA Update Considerations: Considerations: Expanded maintenance windows from 12 to 15 hours on weekend 1 and 2 ( reduced from proposed 18 hrs.) Expanded maintenance windows from 12 to 15 hours on weekend 1 and 2 ( reduced from proposed 18 hrs.) Move Release window from week 2 to week 4 based on less market transaction activity Move Release window from week 2 to week 4 based on less market transaction activity Reduce Outage window from 36 hours to 30 hours Reduce Outage window from 36 hours to 30 hours 4 months each year have 5 weekends so add a 12 hour maintenance window 4 months each year have 5 weekends so add a 12 hour maintenance window RMS will consider October 15 RMS will consider October 15

12. RMS Update to TAC On the Agenda for October 15 On the Agenda for October 15 Consider ERCOT 2009 SLA proposal Consider ERCOT 2009 SLA proposal Consider ERCOT IA and CBA for RMGRR065 and 066 Consider ERCOT IA and CBA for RMGRR065 and 066 Update to Disconnect and Reconnect for Non-Pay Update to Disconnect and Reconnect for Non-Pay Update to Safety Net Move- In Update to Safety Net Move- In Review Retail Market Guide Out-Flow Power from Distributed Renewable Generation Facilities Review Retail Market Guide Out-Flow Power from Distributed Renewable Generation Facilities Consider development of SCR for ERCOT to upgrade Internet Explorer to Ver. 7.0 Consider development of SCR for ERCOT to upgrade Internet Explorer to Ver. 7.0

13. Questions?