Notification of revised ISO operating procedures 2210Z, 2330, 4510B, and 5330

The California ISO has revised the operating procedure(s) referenced below. 

2210Z Effectiveness Factors - All, version 29.7, effective Dec. 18, 2025. 

• 7320: Updated Table 3C, removing Dallas Energy Storage (VISTRA_5_DALBT1, VISTRA_5_DALBT2, VISTRA_5_DALBT3)
• 7440: Updated Table 3, Removing VISTRA_5_DALBT1, VISTRA_5_DALBT2, and VISTRA_5_DALBT3.
• Updated version and date only for the following:
  • 6110: version 14.1, effective 11/01/25
  • 6140A: version 2.4, effective 12/18/25
  • 6410: version 12.1, effective 11/01/25
  • 6610: version 16.3, effective 11/01/25
  • 7110: version 13.5, effective 12/18/25
  • 7410: version 10.2, effective 12/18/25
  • 7550: version 9.3, effective 12/18/25
  • 7230: version 16.1, effective 10/16/25
  • 7430: version 27.3, effective 12/04/25
  • 7760: version 3.1, effective 10/21/25
  • 7820: version 21.0, effective 11/18/25
  • 7910: version 6.2, effective 12/04/25

2330 Real-Time Exceptional Dispatch, version 15.0, effective Dec. 18, 2025. 

Replaced Manger, Real-Time Operations or Manager of Real-Time Operations with Manager, BA (Balancing Authority) Operations or Manager of BA Operations. Defined various terms, minor formatting and grammar edits, and removed history prior to five years.

4510B Demand Response and UDC Interruptible Programs, version 7.6, effective Dec. 18, 2025.

Updated from CAISO Managers, Real-Time Operations to CAISO Managers, BA Operations, and updated mailbox. Minor grammar edits. Details. 

5330 Resource Testing Guidelines, version 12.5, effective Dec. 18, 2025.

Replaced Manager of Real-Time Operations with Manager of BA Operations. Corrected typo in Section 3.2.3, Item 11. Defined various terms throughout procedure. Minor grammar edits and removed history prior to five years.

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