Notification of revised RC West operating procedures RC0120A, RC0120B, RC0120C, and RC0320, and new RC0710 issued

RC West has revised (or issued) the operating procedures referenced below.

RC0120A RC West IRO-010 Data Specification, version 7.0, effective Oct. 1, 2026.

Updated data requests 6.13 and 6.14 regarding Geographic Information System (GIS) Template and lowered voltage to 69 kV. Updated data requests 3.2 – 3.8, spelling out “Reliability Coordination” > Load Forecast. 

Updated Exceptions, including Forecast Data for Req #s 3.5, 3.5 for PacifiCorp (PAC) and Portland General Electric (PGE) - Extended Day Ahead Market (EDAM) entities do not need to submit energy base schedules.

Updated Version History to include "CAISO" Public and shared with RC West Balancing Authorities (BAs) and Transmission Operators (TOPs). 

RC0120B RC West IRO-010 Data Specification for Adjacent RCs (Reliability Coordinators), version 5.0, effective Oct. 1, 2026

Data Specification tab: Updated voltage level for requests RC-6.13 and RC-6. 

Version History tab: Updated Operationally Affected Parties to include "CAISO" Public.

RC0120C ICCP (Inter-Control Center Communications Protocol) or PMU (Phasor Measurement Unit) Data Request Procedure, version 3.6, effective Oct. 1, 2026.

Updated version of North American Electric Reliability Corporation (NERC) TOP-003 in References section, effective 10/01/26. Updated Operationally Affected Parties section to include “CAISO” Public, “and shared” with Alberta Electric System Operator (AESO) RC, BC Hydro RC, Southwest Power Pool (SPP) RC, and all RC West BAs and TOPs.

RC0320 Outage Review and Coordination, version 4.4, effective Oct. 1, 2026.

Removed Los Angeles Department of Water and Power (LDWP) Valley-Rinaldi 230 kV lines 1 and 2 from RC0320 Appendix.

RC0710 Frequency and Voltage Ride-Through Requirements and Unexpected Event Mitigation for Inverter-Based Resources: NERC PRC-029 and PRC-030, version 1.0, effective Oct. 1, 2026.

New procedure created and issued for new North American Electric Reliability Corporation (NERC) PRC-029-1 and PRC-030-1.

The California ISO and RC West operating procedures are available on the Operating Procedures webpage.

Please contact the CAISO/RC West Procedure Control Desk at ProcedureControl@caiso.com with any questions.