The California ISO has revised the operating procedure referenced below.
3640 Existing Transmission Contract Calculator Update, version 8.1, effective Jan. 12, 2021
Updated Section 3.2.2 Resolving Negative Available Transfer Capability (ATC).
Updated all ISO references to CAISO.
Added CAISO Tariff and North American Electric Reliability Corporation (NERC) references.
ISO Operating Procedures - http://www.caiso.com/rules/Pages/OperatingProcedures/Default.aspx
