Proposed Timeline for Extract, Variances, True-Ups

1. Proposed Timeline for Extract, Variances, True-Ups Extracts 9/26/03 Post last “old” daily extract 10/1/03 Clear all “old” extracts from Portal 10/7/03 “New” daily extracts 10/6/03 “New” extracts available Variances 10/1/03 Stop “old” variance process 10/10/03 Complete existing variances w/ answers; Close remaining 10/13/03 Begin filing new variances; Change prioritization on variance work 12/7/03 Deadline to file variances for 1/1/03 True-Up Settlements 10/1/03 Resettlement of 2003 dates beginning with selected June dates 2/7/04 Begin True-Up runs for 2003

2. Proposed Timeline LSE Variances 60 Calendar Days Settlement takes place 10 Business Days 14 Business Days LSE Variances Submit Variance at least 60 days prior to scheduled resettlement ERCOT initial validation and analysis completed TDSP/CR Initial Response • ERCOT: • Takes corrective action and/or • Performs Turnaround with MPs • Responds to submitter • Issues to Consider: • It is possible that the initial response from the TDSP/CR requires a turnaround to the initiator of the issue.

3. Proposed Timeline NIDR Usage Variances 60 Calendar Days Settlement takes place NIDR Usage Variances 45 Calendar Days 15 Calendar Days Submit Variance at least 60 days prior to scheduled resettlement TDSP validation and analysis completed; Response provided to submitting party TDSP to send transactions if necessary • Issues to Consider: • Depending on the resolution of the variance, the TDSP may have to submit transactions. • ERCOT will work with TDSP to resolve any transaction issues to fix variances

4. Proposed Timeline IDR Usage Variances 60 Calendar Days Settlement takes place IDR Usage Variances 45 Calendar Days 15 Calendar Days Submit Variance at least 60 days prior to scheduled resettlement TDSP validation and analysis completed; Response provided to submitting party TDSP to send transactions if necessary • Issues to Consider: • Depending on the resolution of the variance, the TDSP may have to submit transactions. • ERCOT will work with TDSP to resolve any transaction issues to fix variances

5. Proposed Timeline Service History – ESI ID Characteristics Variances 60 Calendar Days Settlement takes place 45 Calendar Days 15 Calendar Days ESI ID Characteristics Submit Variance at least 60 days prior to scheduled resettlement TDSP validation and analysis completed; Response provided to submitting party TDSP to send transactions if necessary Settlement takes place 10 Calendar Days 15 Calendar Days ESI ID Existence Submit Variance at least 60 days prior to scheduled resettlement ERCOT validation and analysis completed TDSP to send transactions if necessary • Issues to Consider: • Depending on the resolution of the variance, the TDSP may have to submit transactions. • ERCOT will work with TDSP to resolve any transaction issues to fix variances

6. ERCOT Proposed Changes • Require 60 Calendar Days for complete resolution to all issues • Prioritization • Work Issues according to submission date • Issues should be submitted in chronological order for True-Up Settlements • Allow usage variances only if the variance involves an ADU change of at least ?? kWh