Common use of Headroom Account Adjustments in the ATBA Clause in Contracts

Headroom Account Adjustments in the ATBA. In addition to the adjustments made by the ISO in Headroom accounts to reflect the impact of subsequent Projects, the ISO will make other adjustments to Headroom accounts when preparing for each Annual Transmission Baseline Assessment. The ISO will make these adjustments to reflect the impact of changes in the Existing System Representation modeled for the Annual Transmission Baseline Assessment that result from the installation, expansion or retirement of generation and transmission facilities for load growth and changes in load patterns. Such changes in the Existing System Representation can also result from changes in these rules or the criteria, methods or, software used to apply these rules. 25.8.8.1 No compensation will be paid as a result of these changes to the Existing System Representation. However, the ISO will adjust the ratios of dollars to electrical values in each Entity’s account to maintain the economic value of the Entity’s account that existed before the changes were made in the Existing System Representation. 25.8.8.2 The ISO will make no adjustments to Headroom accounts for the impact of subsequent generic solutions, except in those cases where the generic solution is a Class Year Project and the adjustment is made to reflect the impact of the Class Year Project.

Headroom Account Adjustments in the ATBA. In addition to the adjustments made by the ISO NYISO in Headroom accounts to reflect the impact of subsequent Projectsprojects, the ISO NYISO will make other adjustments to Headroom accounts when preparing for each Annual Transmission Baseline Assessment. The ISO NYISO will make these adjustments to reflect the impact of changes in the Existing System Representation modeled for the Annual Transmission Baseline Assessment that result from the installation, expansion or retirement of generation and transmission facilities for load growth and changes in load patterns. Such changes in the Existing System Representation can also result from changes in these rules or the criteria, methods or, software used to apply these rules. 25.8.8.1 No compensation will be paid as a result of these changes to the Existing System Representation. However, the ISO NYISO will adjust the ratios of dollars to electrical values in each Entity’s account to maintain the economic value of the Entity’s account that existed before the changes were made in the Existing System Representation. 25.8.8.2 The ISO NYISO will make no adjustments to Headroom accounts for the impact of subsequent generic solutions, except in those cases where the generic solution is a Class Year Project project and the adjustment is made to reflect the impact of the Class Year Projectproject.