1. Lead from the front Texas Nodal http://nodal.ercot.com 1 Registration and RARF Update to TPTF August 27, 2007

2. Lead from the front Texas Nodal http://nodal.ercot.com 2 Update on Registration for Transition to Nodal Market Update on Registration for Transitioning to the Nodal Market Registration applications –Applications are complete and posted on ERCOT.com July’07 and are available for execution as appropriate –CRR Account Holder Application (http://www.ercot.com/services/rq/crr/index.html )http://www.ercot.com/services/rq/crr/index.html –QSE Application (http://www.ercot.com/services/rq/qse/index.html )http://www.ercot.com/services/rq/qse/index.html –TSP/DSP (http://www.ercot.com/services/rq/tdsp/index.html )http://www.ercot.com/services/rq/tdsp/index.html Execute Standard Form Agreements (SFA) –ERCOT Board meeting in July approved NPPR058 and PRR729 which finalized SFA –SFA now identical for zonal and nodal (so no re-execution for nodal will be needed) –ERCOT Legal began circulating SFA on Aug 3, TPTF also notified Aug 6 th. –DUE DATE- October 15, 2007 –For Non-Opt In Market Participants Vying for PCRR Entitlement. DUE DATE of September 28, 2007.

3. Lead from the front Texas Nodal http://nodal.ercot.com 3 Update on Registration for Transition to Nodal Market (continued) Update on Registration for Transitioning to the Nodal Market Attestation of Qualification of Ancillary Services –Form for QSEs wanting to “grandfather” their zonal qualification into nodal –Posted 7/2/07 and available at ( http://nodal.ercot.com/readiness/rq/documents/index.html ) http://nodal.ercot.com/readiness/rq/documents/index.html –DUE DATE- September 4, 2007 Resource Asset Registration Form (RARF) –Nodal RARF pre-populated and emailed to Generation Resources only ERCOT also included copy of zonal GARF on file –RARF entries were filtered to only request data for EDS3 (see next page) –Hosted RARF Q&A Meeting on 8/9/07 to address common questions and provide sample of Combined Cycle Most questions related to Ramp Rates, Reasonability Limits, and Combined Cycle –DUE DATE- September 4, 2007

4. Lead from the front Texas Nodal http://nodal.ercot.com 4 Resource Asset Registration Form Evolution From Zonal Generation Forms to Nodal RARF –ZONAL Forms GARF (Generation and Load) Generation Data Forms –NODAL Form Market to Complete RARF –Consolidation of GARF –Generation Data Forms spreadsheet –New Nodal Data Elements Generation Data Forms –PTI data will be carried over from Zonal

5. Lead from the front Texas Nodal http://nodal.ercot.com 5 Resource Asset Registration Form (continued) –Questions on RARF High/Low Reasonability Limits –Nodal field per protocol 3.7.1- An "Out-of-Bounds" value chosen by RE and used by ERCOT to alarm/reject data exceeding the value. »This value validate data submitted to ERCOT »Examples- alarms ICCP, rejects COP, etc. Ramp Rate Curve –ABB Software handles as a Simple Staircase Curve… »3 Points; MW1=50 / RRUp1 = 5MW/min, MW2=100 / RRUp2 = 8MW/min, MW3=150 / RRUp3 = 4MW4/min »MMS/ABB Interpretation: 0->99MW = 5MW/min, 100-149MW = 8MW/min, 150-initinity = 4MW/min

6. Lead from the front Texas Nodal http://nodal.ercot.com 6 Other Nodal Activities Supporting Nodal Registration: Additional Registration information is needed in transitioning to the nodal market. ERCOT will begin process to formally describe and track the following activities for transitioning to Nodal: Confirming Generation Resource Metering to EPS Meters Submitting Eligible contracts and entitlements for PCRRs Declaration of NOIE Load Zones Submission of Verifiable Costs Dynamic Scheduling Registration activities

7. Lead from the front Texas Nodal http://nodal.ercot.com 7 Outlook for timing of Registration Activities: Feb 08 Mar 08 Dec 07Nov 07Jan 08 Oct 07 Aug 07Sep 07 Jul 07 Standard Form Agreements A/S Attestation RARF PCRR Paperwork RARF- 9/4/07 SFA- due 10/15/07 Attestation- due 9/4/07 RARF #2 ? PCRR docs due- 12/1/07 Registration Activities NOIE Load Zone Declaration NOIE declaration due- 12/1/07 Registration Applications Applications available Dynamic Scheduling Confirm EPS Metering Verifiable Costs Circulate metering data (tentative) CRR Registration by 1/15/08 for Phase1 participation New QSEs to register for DAM participation SFA for NOIE – 9/28/07

8. Lead from the front Texas Nodal http://nodal.ercot.com 8 Next Steps and Questions/Answers Next Steps Due Sept 4, 2007 (adjusted for holiday) –First iteration of RARF from Generation Resource Entities –Attestation of Qualification of Ancillary Services Due October 15, 2007 –Standard Form Agreement Next Registration meeting is tentatively mid-September –Registration update –Focus on CRR/PCRR preparation Questions/Comments?