Definitions for "OATT"
Open Access Transmission Tariff. Utility rates schedules and terms and conditions for open access transmission services on file with the Federal Energy Regulatory Commission (FERC).
The transmission provider's Open Access Transmission Tariff.
Open Access Transmission Tariff. Filed with the FERC, this tariff sets the rates, terms and conditions under which transmission and ancillary transmission services are provided. It contains sections pertaining to both Point-To-Point Transmission Service and Network Integration Transmission Service in conjunction with applicable Common Service Provisions and appropriate Schedules and Attachments.