Only one Ancillary Service is provided under Schedule 21. This service—Scheduling, System Control and Dispatch Service—is required to be taken by all customers taking service under the company’s Schedule 21. It is not necessary for customers to request this Ancillary service via the OASIS. The transmission customer will automatically be billed for Scheduling, System Control and Dispatch Service based on its transmission service request. Please note that the customer may be responsible for acquiring additional ancillary services under the ISO-NE tariff as a customer taking service under the ISO-NE OATT. See Schedules 2-7 of the ISO-NE OATT.
Issued on July 13, 2007