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Market Notice
May 3, 2019


Request for Comment


Business Practice Manuals

BPM Change Management: Proposed Revision Requests and Updated BPMs Posted as of 5/7/19


The California ISO has posted new proposed revision requests (PRRs) reflecting edits to Business Practice Manuals (BPM). 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 at


The PRRs listed below have an open 10-business day comment or appeal period from May 3, 2019 through May 17.


New PRRs

There are no new PRRs to report.


ISO Recommendations

There are no PRRs to report.


ISO Final Decisions

PRR 1148 Settlements and Billing BPM, Updated BPM configuration guide for pre-calculation system resource deemed delivered energy quantity 5.3 to ensure ISO dynamic system resources LMC quantity is not derived at twice the value it should be

PRR 1147 Market Operations BPM, Emergency PRR, Conditionally available resource

PRR 1146 Market Operations BPM, Emergency PRR, Locational marginal prices clarification

PRR 1145 Market Instruments BPM, Emergency PRR, Congestion revenue rights 1B enhancement

PRR 1144 Settlements and Billing BPM, Emergency PRR, Update the pre-calculation metered subsystem deviation penalty quantity configuration to properly address negative SUPP quantities for cases where Day Ahead Award is zero for MSS load following resources

PRR 1143 Market Instruments BPM, Attachment J update

PRR 1142 Energy Imbalance Market BPM, Emergency PRR, EIM resource sufficiency test enhancements

PRR 1141 Market Instruments BPM, Emergency PRR, EIM resource sufficiency test enhancements

PRR 1140 Reliability Requirements BPM, Emergency PRR, Commitment cost enhancement phase 3

PRR 1139 Outage Management BPM, Emergency PRR, Updates to nature of work attributes for generation outages and outage reporting section


BPM updates

The reference document 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 ISO website at


Julia Payton at 916-608-1133 or

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California Independent System Operator | P.O. Box 639014 | Folsom, CA 95630 | United States