BPM change management: Proposed revision requests and updated BPMs posted as of 3/3/26

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 activities 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 March 3, 2026, through March 17, 2026.

New ISO PRR’s

PRR 1661 Market Operations BPM, New long start resource min down time awareness enhancement

PRR 1662 Settlements and Billing BPM, Updating settlement configuration guides for day-ahead market enhancements, extended day-ahead market, and California ISO's balancing authority area participation in the extended day-ahead market

PRR 1663 Reliability Requirements BPM, Changes due to the day-ahead market enhancements and extended day-ahead market policy initiatives

PRR 1664 Extended Day-Ahead Market BPM, New attachment A - California ISO's balancing authority area supplement to the extended day-ahead market BPM

PRR 1665 Extended Day-Ahead Market BPM, Initial version of extended day-ahead market BPM

PRR 1666 Market Operations BPM, Various updates related to aggregate capability constraints

*Note: PRRs for the Extended Day-Ahead Market are temporarily listed under the Market Operations BPM while the EDAM BPM is being added to the PRR tool. 

ISO Recommendations

PRR 1660 Energy Imbalance Market BPM, Clarification of variable energy resource persistence forecasting

On Hold

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

PRR 1658 Market Operations BPM, Clarifications on use of the off grid charging indicator

PRR 1659 Reliability Requirements BPM, Flexible resource adequacy showings must-offer obligation clarification

ISO Final Decisions 

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

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 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.