April 2, 2024
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Legal & Regulatory
BPM change management: Proposed revision requests and updated BPMs posted as of 4/2/24

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 April 2, 2024 through April 16, 2024.


New PRRs


PRR 1556 Market Operations n BPM, Clarification on hybrid dynamic limits submission requirements

PRR 1557 Market Operations BPM, Two minor updates related to multistage generators functionality

PRR 1558 Settlements and Billing BPM, New OASIS report labeled ATC for PWT Requests

PRR 1559 Settlements and Billing BPM, Updating BPM ETC PC TOR CVR Quantity business rule to support Transmission Exchange Agreement Initiative

PRR 1560 Settlements and Billing BPM, Updated BPM Configuration guide for PC CG PC Wheel Export Quantity to accommodate TSMSP2

PRR 1561 Settlements and Billing BPM, Updated BPM Configuration guide RMT Net Amount PC to accommodate market enhancement to AS SOC Constraint.

PRR 1562 Settlements and Billing BPM, Configuration updates to the RT Energy Quantity PC to add new WEIM Pumped Storage Interval Resource Base Schedule variable as an input to the Settlement Interval Resource Base Schedule.

PRR 1563 Settlements and Billing BPM, Created and updated multiple BPM Configuration guides to exclude BASE ETSRs from being considered in AET calculations, and flags for corrections to RSE Pass/Fail scenarios.

PRR 1564 Settlements and Billing BPM, Updated Real Time Congestion Pre-Calc 5.8 to accommodate a fix to show nodal congestion calculations.

PRR 1565 Settlements and Billing BPM, Update configuration guide for RAAIM PC to resolve data overlap for the same resource on acquired rights and run of river RAAIM exemption

PRR 1566 Market Operations BPM, Updating multiple BPMs for correct settlement of hybrid tie generator resources.

PRR 1567 Market Operations BPM, Updates to constraints related to the impact of ancillary service awards on state of charge on storage resources

a href="">PRR 1568 Market Operations BPM, Clarifying tagging requirements in support of resource sufficiency evaluation Phase 2 Project


ISO Recommendations


PRR 1554 Credit Management and Market Clearing BPM, Minor revision to Section 6.2 Estimated Aggregate Liability Components


PRR 1555 Rules of Conduct Administration BPM, Rules of Conduct Enhancements - Phase 1


ISO Final Decisions


PRR 1547 Market Operations BPM, Clarification to ancillary service state of charge constraint and bid cost recovery


PRR 1548 Market Operations BPM, Emergency PRR, New process for establishing wheeling through priority effective June 2024


PRR 1550 BPM Change Management BPM, Correction to document formatting, updated hyperlinks, and language to bring Change Management BPM current


PRR 1551 Definitions and Acronyms BPM, Updating Definitions and Acronyms BPM Per Recent Updates


PRR 1552 Market Operations BPM, Clarification on Number of Historical Days Used in the Mosaic Quantile Regression


PRR 1553 Transmission Planning Process BPM, Gen Model Data Requirements Real Reactive Capability Testing Process Clarification


ISO PRR on to Hold Status


PRR 1545 Generator Interconnection and Deliverability Allocation Procedures BPM, Interim Deliverability allocation to projects in operation clarification


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.


Please contact Nicole Hines at 916-597-8108 or with any questions.

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