BPM change management: Proposed revision requests and updated BPMs posted as of 6/2/26

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 webpage.

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 2, 2026, through June 16, 2026.

New ISO PRRs

• 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 Recommendations

• 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

ISO Final Decisions 

• PRR 1668 Market Operations BPM, Initial version of the market operations BPM changes for the day-ahead market enhancements and extended day-ahead market initiatives

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.

Meeting information