BPM change management: Proposed revision requests and updated BPMs posted as of 12/23/2025

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 Dec. 23, 2025 through Jan. 8, 2026.

New ISO PRR’s

None

ISO Recommendations

PRR 1644 Generator Interconnection and Deliverability Allocation Procedures BPM, Stand-Alone Network Upgrade Clarification

PRR 1647 Generator Interconnection and Deliverability Allocation Procedures BPM, Clarification of project financial-security posting requirements

PRR 1653 Market Operations BPM, Real Time market High and low unit operating limit usage for Regulation

PRR 1654 Congestion Revenue Rights BPM, Changes related to additional collateral requirement

PRR 1655 Transmission Planning Process BPM, Subscriber PTO updates from Tariff Section 24

PRR 1656 Outage Management BPM, Clarifying Nature of Work for generation outages related to distribution utility limitations

PRR 1657 Scheduling Coordinator Certification and Termination BPM, Clarifying real-time test requirement and adding section for contact list requirements

ISO final decisions 

PRR 1640 BPM Change Management BPM, New PRR status, additional and general PRR updates

PRR 1642 Generator Interconnection and Deliverability Allocation Procedures BPM, Intra-cluster prioritization deliverability clarification

PRR 1643 Generator Management BPM, Limited Operation Study Deliverability Clarification

PRR 1651 Candidate CRR Holder Registration BPM, Update Training CBT List for CRR Certification

PRR 1652 Market Operations BPM, Real-time bid cost recovery calculations for limited energy storage resources

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.