Lead from the front Texas Nodal 1 Registration Update to TPTF Patrick Coon / Matt Mereness August 13 th, 2007

Lead from the front Texas Nodal 2 Update on Registration for Transition to Nodal Market Reminder that Registration and Qualification Guide provides high level view of transitional Registration steps by MP role:

Lead from the front Texas Nodal 3 Update on Registration for Transition to Nodal Market (continued) Update on Registration for Transitioning to the Nodal Market Step R1- Registration applications –Applications are complete and posted on ERCOT.com July’07 and are available for execution as appropriate –CRR Account Holder Application ( ) –QSE Application ( ) –TSP/DSP ( ) Step R2- 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

Lead from the front Texas Nodal 4 Update on Registration for Transition to Nodal Market (continued) Update on Registration for Transitioning to the Nodal Market Step R3- Attestation of Qualification of Ancillary Services –Form for QSEs wanting to “grandfather” their zonal qualification into nodal –Posted 7/2/07 and available at ( ) –DUE DATE- September 4, 2007 Step R4- Resource Asset Registration Form (RARF) –Nodal RARF pre-populated and ed 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

Lead from the front Texas Nodal 5 Resource Asset Registration Form - First iteration of RARF is filtered to request only enough data to support EDS3 Other Highlights: Color coding Different worksheets for different resource types Glossary available

Lead from the front Texas Nodal 6 Other activities being looked at for support of nodal registration: It was discussed at the June 6 th Registration Kick-Off Meeting that other Registration information is needed beyond Steps 1-4 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

Lead from the front Texas Nodal 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

Lead from the front Texas Nodal 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?