Notification of revised ISO operating procedure 5370

The California ISO has revised operating procedure;

5370 Resource Performance Verification, version 7.7, effective Oct. 6, 2025. 

Summarized testing efforts in background to give better transparency to amount of testing ongoing. Added statement about data requests with reasons that a resource may be unable to be tested. Added details about the Monthly Regulation Audit in Section 3.1.1.1.1. Added more clarity on how resources are selected for an unannounced AS Test in Section 3.1.1.2. Updated from NSI (Net Scheduled Interchange) to (NIS) Scheduled Net Interchange to align with BAL-004-WECC-4 update on 10/01/25 Section 3.1.1.2.2. Updated from Manager of Real-Time Operations and Manager, Real-Time Operations to Manager of Balancing Authority (BA) Operations and Manager, BA Operations. Minor formatting and grammar edits and removed history prior to five years.

The California ISO’s operating procedures are available on the Operating Procedures webpage.