BPM change management: Proposed revision requests and updated BPMs posted as of 9/1/26

The California ISO (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 Sep. 1, 2026, through Sep. 16, 2026.

New ISO PRRs

PRR 1695 Resource Interconnection Standards BPM, New BPM for resource interconnection standards

PRR 1696 Settlements and Billing BPM, Emergency settlement release to fix high priority settlement variances and projects

PRR 1699 Market Operations BPM, Clarifications on how intertie transmission corridor and intertie scheduling limits constraints are used for imbalance reserves

PRR 1700 Market Operations BPM, Clarification on use for the automated dispatch system automatic generation control flag

PRR 1701 Market Operations BPM, Removed three percent generation, three percent load from reserve requirement calculations

PRR 1702 Reliability Requirements BPM, Clarifications and clean up

PRR 1703 Generator Management BPM, Interconnection process enhancements 5.0 implementation for commercial viability criteria and contact requirements for agreements

PRR 1704 Metering BPM, Update to meter inspection policy and market results interface-settlements access

PRR 1705 Energy Imbalance Market BPM, Provides additional guidance on the steps required to disable real-time market participation

ISO Recommendations

PRR 1687 Settlements and Billing BPM, Emergency settlement release to fix high priority settlement variances

PRR 1688 Market Operations BPM, Formula details on fifteen-minute market ex-post capacity calculations 

PRR 1689 Settlements and Billing BPM, Emergency settlement release to fix high priority settlement variances

PRR 1690 Market Operations BPM, Clarification on tagging megawatts back into CAISO BA from a non-contiguous portion of CAISO BA

PRR 1691 Market Instruments BPM, Adding references back to market ops BPM on circular scheduling

PRR 1692 Settlements and Billing BPM, Day-ahead contingency analysis as a service charge

PRR 1693 Reliability Requirements BPM, 2027 Availability assessment hours

PRR 1694 Energy Imbalance Market BPM, Clarification on the net intertie transmission constraint design and flexible ramping product

ISO Final Decisions

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

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