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August 6, 2019


Request for Comment


Business Practice Manuals

BPM Change Management: Proposed Revision Requests and Updated BPMs Posted as of 8/6/19


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 Aug. 6, 2019 through August 20.


New PRRs

There are no new PRRs to report.


ISO Recommendations

PRR 1170 Market Operations BPM, Emergency PRR, Conditionally Available Resource (CAR) treatment and registration process

PRR 1167 Market Operations BPM, Manually assigned ancillary services clarification

PRR 1166 Market Instruments BPM, Emergency PRR, Opportunity costs in scheduling infrastructure and business rules (SIBR) generated cost bids

PRR 1165 Market Instruments BPM, Energy storage and distributed energy resources phase 3A

PRR 1164 Settlements and Billing BPM, Emergency PRR, Update the pre-calculation spin non-spin no pay quantity BPM to resolve a document only equation error

PRR 1163 Settlements and Billing BPM, Reliability coordinator services implementation of settlements and billing includes the creation of new reliability coordinator and hosted advanced network application (HANA) services charge codes and the termination of one charge code

PRR 1162 Market Operations BPM, Language update to the flexible ramp histogram calculation


ISO Final Decisions

PRR 1161 Generator Management BPM, Clerical edits

PRR 1160 Generator Management BPM, Meter services agreement for scheduling coordinators

PRR 1159 Generator Management BPM, Interconnection procedure enhancements implementation 2018

PRR 1158 Generator Interconnection Procedures BPM, 2019 Interconnection procedure enhancements - project name publication, financial security modifications

PRR 1157 Generator Interconnection and Deliverability Allocation Procedures BPM, 2019 Interconnection procedure enhancements - project name publication, financial security modifications

PRR 1156 Market Operations BPM, Emergency PRR, Energy imbalance market upward available balancing capacity range penalty price

PRR 1155 Reliability Requirements BPM, References to Tariff 43A and availability assessment hour for 2020

PRR 1154 Reliability Requirements BPM, Resource adequacy availability incentive mechanism exemption updates


BPM Library 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