BPM change management: Proposed revision requests and updated BPMs posted 4/29/25

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 April 29, 2025, through May 13, 2025.

New ISO PRR’s

PRR 1622 and 1623 Not Used
PRR 1624 Scheduling Coordinator Certification and Termination BPM, updating affiliate information and how they are associated 

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

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

PRR 1627 Market Operations BPM, Emergency PRR, Adding state of charge to flexible ramping awards determination. Please submit comments related to the policy conversation informing PRR 1627 through the commenting tool on the Storage Design and Modeling initiative webpage by May 13. These comments will inform future policy discussions.

PRR 1628 Generator Management BPM, Additional changes for 2023 interconnection process enhancements track 2. 

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

ISO Recommendations

PRR 1620 Reliability Requirements BPM, Clarification regarding eligible generating units as new use import commitments. 

PRR 1621 Candidate CRR Holder Registration BPM, Emergency PRR, Updating application with new congestion revenue rights customer types. 

ISO Final Decisions

PRR 1617 Not Used
PRR 1618 Market Instruments BPM, Emergency PRR, Clarifications to the after-market cost recovery process. 

PRR 1619 Congestion Revenue Rights BPM, Changes related to implementation of the congestion revenue rights replacement project

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.