BPM change management: Proposed revision requests and updated BPMs posted 7/1/25

The California ISO has posted new Proposed Revision Requests (PRRs) reflecting edits to Business Practice Manuals (BPMs). Revised BPMs that have completed the BPM change management process are posted in the BPM Library. All PRRs and related activity are publicly available through the BPM change management site.

BPM PRR updates are part of the ISO Daily Briefing in addition to being listed in the “Announcement” sections of the BPM change management tool. These updates include PRRs that have become available for review, upcoming BPM meetings, and comment due dates. All registered BPM users should continue to reference the BPM Change Management tool to see current PRR status. Subscribe to the Daily Briefing to stay up to date.

The PRRs listed below have an open 10-business day comment or appeal period from July 1, 2025, through July 16, 2025.

New ISO PRR’s

PRR 1634 Outage Management BPM, Emergency PRR, Clarification on generation outage nature of work to include curtailment due to plant configuration parameters

PRR 1633 Generator Interconnection and Deliverability Allocation Procedures BPM, Updates related to the Interconnection Process Enhancements Track 3 stakeholder initiative

PRR 1632 Generator Management BPM, Interconnection process enhancements 2023, FERC order 2023, and miscellaneous updates

ISO Recommendations

PRR 1631 Market Operations BPM, Emergency PRR, Automated logic to achieve a market solution

PRR 1630 Reliability Requirements BPM, Emergency PRR, Update regarding generating units deliverability status

ISO PRR Withdrawn

PRR 1626 Market Operations BPM, Activation of contingency-based flow gates in fifteen-minute market. 

ISO Final Decisions

PRR 1629 Energy Imbalance Market BPM, Addition of seasonal opt-in for CAISO balancing authority. 

PRR 1627 Market Operations BPM, Emergency PRR, Adding state of charge to flexible ramping awards determination. 

PRR 1625 Transmission Planning Process BPM, Emergency PRR, Competitive solicitation timeline for selection of approved project sponsor. 

PRR 1624 Scheduling Coordinator Certification and Termination BPM, Updating affiliate information and how they are associated 

BPM Library Updates

The PRR tracking log on the ISO website lists the updated BPMs in the library. 

The ISO may unilaterally make and implement revisions to the BPMs in emergency circumstances, as set forth in Sections 22.4.3 and 22.11 of the ISO Tariff and in Section 2.6 of the Business Practice Manual for BPM Change Management. An emergency PRR will continue through the BPM change management stakeholder process to obtain stakeholder input on the revisions and make other recommendations, as necessary.

Please note that affected parties must register in order to submit a PRR or written comments.

More information on the BPM change management process is available on the BPM webpage of the ISO website.