BPM change management: Proposed revision requests and updated BPMs posted as of 6/30/26

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 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 June 30, 2026, through July 15, 2026.

 New ISO PRRs

PRR 1680 Settlements and Billing BPM, Emergency day-ahead market enhancement and extended day-ahead market fixes for high-priority variances

PRR 1681 Settlements and Billing BPM, Emergency settlement release to fix congestion revenue allocation related congestion calculations

PRR 1682 Market Operations BPM, Updates to the admin pricing process for the market separation or isolation of the western energy imbalance market or extended day-ahead market  

PRR 1683 Generator Management BPM, Commercial operation for markets and other clarification, and general document cleanup

PRR 1684 Reliability Requirements BPM, Resource transitions from inside to outside the ISO balancing authority area

PRR 1685 Market Instruments BPM, Addition of extended day ahead market balancing authority area aggregated transfers open access same time information system report

PRR 1686 Market Instruments BPM, Shift factor report updated to reflect the new deployment scenario column / attribute added by the extended day-ahead market

 ISO Recommendations

PRR 1673 Settlements and Billing BPM, Emergency day-ahead market enhancements and extended day-ahead market incremental updates to PRR 1662

PRR 1674 Settlements and Billing BPM, Emergency settlement fixes for high-priority variances

PRR 1675 Scheduling Coordinator Certification and Termination BPM, Clarifying 24/7 real time phone number and testing requirements

PRR 1677 Outage Management BPM, Clarify outage reporting requirements for non-generator resources and add storage-related cause descriptions to the plant trouble nature of work category

PRR 1678 Market Operations BPM, Clarification on how storage resources are subject to ancillary service state of charge constraints and envelope constraints

PRR 1679 Direct Telemetry BPM, Updates to battery point definitions

 ISO Final Decisions 

PRR 1669 Market Operations BPM, New day-ahead market enhancements configurable parameters

PRR 1670 Extended Day-Ahead Market BPM, New initial condition treatment available in the extended day-ahead market

PRR 1671 Reliability Requirements BPM, Incorporate default resource adequacy rules

PRR 1672 Extended Day-Ahead Market BPM, Extended day-ahead market transition-period pricing details

 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 Business Practice Manuals webpage of the ISO website.

Please contact the BPM Team at BPM_CM@caiso.com with any questions.