Tariff

The California ISO operates under the terms and conditions of its FERC-approved tariff, which is modified, amended, supplemented or restated as needed. Each section or appendix of the tariff is maintained and updated independently according to effective dates of the FERC accepted tariff amendments.

If a provision of an existing ISO contract, business practice manual or operating procedure conflicts with it, the tariff will prevail to the extent of the inconsistency.

Current combined tariff

Tariff sections

Title Type Posted
Section 1 - Definitions and Interpretation as of Feb 28, 2011 Tariff 12/05/2023, 10:16 AM
Section 2 - Access to the California ISO Controlled Grid as of Jun 28, 2010 Tariff 03/21/2018, 1:56 PM
Section 3 - Local Furnishing Other Tax Exempt Bond Facility Financing as of Jun 28, 2010 Tariff 03/21/2018, 1:57 PM
Section 4 - Roles and Responsibilities as of May 1, 2026 Tariff 06/30/2026, 9:07 AM
Section 5 - Black Start and System Restoration as of Sep 9, 2020 Tariff 09/14/2020, 3:04 PM
Section 6 - Communications as of May 1, 2026 Tariff 06/30/2026, 9:07 AM
Section 7 - System Operations Under Normal and Emergency Conditions as of May 1, 2026 Tariff 06/30/2026, 9:08 AM
Section 8 - Ancillary Services as of May 1, 2026 Tariff 06/30/2026, 9:08 AM
Section 9 - Outages as of Nov 1, 2023 Tariff 11/07/2023, 2:46 PM
Section 10 - Metering as of Jan 6, 2025 Tariff 01/10/2025, 10:59 AM
Section 11 - California ISO Settlements and Billing as of May 01, 2026 Tariff 07/13/2026, 4:19 PM
Section 12 - Creditworthiness as of Feb 5, 2025 Tariff 02/07/2025, 11:47 AM
Section 13 - Dispute Resolution as of Jan 1, 2021 Tariff 01/05/2021, 8:06 AM
Section 14 - Uncontrollable Force, Indemnity, Liabilities, and Penalties as of Sep 9, 2020 Tariff 09/16/2020, 8:10 AM
Section 15 - Regulatory Filings as of Jul 8, 2025 Tariff 07/08/2025, 12:06 PM
Section 16 - Existing Contracts as of Aug 6, 2025 Tariff 08/12/2025, 11:20 AM
Section 17 - Transmission Ownership Rights (TORs) as of Aug 12, 2019 Tariff 08/22/2019, 8:37 AM
Section 18 - Not Used as of Jun 28, 2010 Tariff 03/21/2018, 1:47 PM
Section 19 - Reliability Coordinator as of Sep 9, 2020 Tariff 09/16/2020, 8:10 AM
Section 20 - Confidentiality as of Jul 26, 2024 Tariff 07/29/2024, 4:13 PM
Section 21 - Not Used as of Jun 28, 2010 Tariff 03/21/2018, 2:00 PM
Section 22 - Miscellaneous as of Jan 6, 2025 Tariff 01/10/2025, 10:59 AM
Section 23 - Categories of Transmission Capacity as of Feb 5, 2025 Tariff 02/07/2025, 11:47 AM
Section 24 - Comprehensive Transmission Planning Process as of Nov 19, 2025 12/08/2025, 1:35 PM
Section 25 - Interconnection of Generating Units and Facilities as of Dec 17, 2024 Tariff 06/12/2025, 4:07 PM
Section 26 - Transmission Rates and Charges as of May 1, 2026 Tariff 06/30/2026, 9:08 AM
Section 27 - California ISO Markets and Processes as of May 1, 2026 Tariff 06/30/2026, 9:09 AM
Section 28 - Inter-Scheduling Coordinator Trades as of Feb 5, 2025 Tariff 02/07/2025, 11:47 AM
Section 29 - Energy Imbalance Market as of May 01, 2026 Tariff 07/14/2026, 2:09 PM
Section 30 - Bid and Self-Schedule Submission in California ISO Markets as of May 01, 2026 Tariff 07/14/2026, 2:09 PM
Section 31 - Day-Ahead Market as of May 01, 2026 Tariff 07/14/2026, 2:09 PM
Section 32 - Not Used as of Jun 28, 2010 Tariff 03/21/2018, 1:53 PM
Section 33 - Extended Day-Ahead Market as of May 01, 2026 Tariff 07/14/2026, 3:27 PM
Section 34 - Real-Time Market as of May 1, 2026 Tariff 06/30/2026, 9:10 AM
Section 35 - Market Validation and Price Correction as of May 1, 2026 Tariff 06/30/2026, 9:10 AM
Section 36 - Congestion Revenue Rights as of May 1, 2026 Tariff 06/30/2026, 9:11 AM
Section 37 - Rules of Conduct as of Jan 6, 2025 Tariff 01/10/2025, 10:59 AM
Section 38 - Market Monitoring as of Jun 28, 2010 Tariff 03/21/2018, 1:47 PM
Section 39 - Market Power Mitigation Procedures as of May 1, 2026 Tariff 06/30/2026, 9:11 AM
Section 40 - Resource Adequacy Demonstration for Scheduling Coordinators in the CAISO Balancing Authority Area as of May 29, 2026 Tariff 07/16/2026, 2:23 PM
Section 41 - Procurement of Reliability Must-Run Resources as of Feb 11, 2023 Tariff 02/17/2023, 8:01 AM
Section 42 - Adequacy of Facilities to Meet Applicable Reliability Criteria as of Aug 12, 2019 Tariff 08/22/2019, 8:37 AM
Section 43 - Not Used as of Aug 12, 2019 Tariff 12/28/2022, 8:29 AM
Section 43A - Capacity Procurement Mechanism as of May 29, 2026 Tariff 07/16/2026, 2:23 PM
Section 44 - Flexible Ramping Product as of May 1, 2026 Tariff 06/30/2026, 9:11 AM
No results

View previous Tariff sections. 

Current tariff appendices A - Z

Title Type Posted
Appendix A - Master Definition Supplement as of May 29, 2026 Tariff 07/16/2026, 2:23 PM
Appendix B.1 - Scheduling Coordinator Agreement as of Jun 12, 2013 Tariff 03/21/2018, 1:52 PM
Appendix B.2 - Participating Generator Agreement as of Jun 12, 2013 Tariff 03/21/2018, 1:49 PM
Appendix B.3 - Net Scheduled Participating Generator Agreement as of Sep 09, 2020 Tariff 09/18/2020, 9:04 AM
Appendix B.4 - Participating Load Agreement as of Jun 12, 2013 Tariff 03/21/2018, 1:59 PM
Appendix B.5 - Dynamic Scheduling Agreement for Scheduling Coordinators as of Jun 12, 2013 Tariff 03/21/2018, 2:02 PM
Appendix B.6 - Meter Service Agreement for California ISO Metered Entities as of Jun 12, 2013 Tariff 03/21/2018, 1:48 PM
Appendix B.7 - Meter Service Agreement for Scheduling Coordinators as of Jun 12, 2013 Tariff 03/21/2018, 1:50 PM
Appendix B.8 - Utility Distribution Company Operating Agreement as of Jun 12, 2013 Tariff 03/21/2018, 1:57 PM
Appendix B.9 - Dynamic Scheduling Host Balancing Authority Operating Agreement as of Sep 9, 2020 Tariff 09/18/2020, 9:04 AM
Appendix B.10 - Small Utility Distribution Co. Operating Agreement as of Feb 11, 2023 Tariff 02/17/2023, 10:30 AM
Appendix B.11 - Congestion Revenue Rights Entity Agreement as of Sep 9, 2020 Tariff 09/18/2020, 9:04 AM
Appendix B.12 - Metered Subsystem Aggregator Congestion Revenue Right Entity Agreement as of Jun 12, 2013 Tariff 03/21/2018, 1:49 PM
Appendix B.13 - Resource-Specific System Resource Agreement as of Sep 9, 2020 Tariff 09/18/2020, 9:04 AM
Appendix B.14 - Demand Response Provider Agreement as of Sep 9, 2020 Tariff 09/18/2020, 9:04 AM
Appendix B.15 - Convergence Bidding Entity Agreement as of Jun 12, 2013 Tariff 03/21/2018, 1:57 PM
Appendix B.16 - Pseudo-Tie Participating Generator Agreement as of Jan 30, 2021 Tariff 02/02/2021, 4:23 PM
Appendix B.17 - EIM Entity Agreement as of Sep 9, 2020 Tariff 09/18/2020, 9:04 AM
Appendix B.18 - EIM Entity Scheduling Coordinator Agreement as of Jul 1, 2014 Tariff 03/21/2018, 1:57 PM
Appendix B.19 EIM Participating Resource Agreement as of Aug 3, 2024 Tariff 12/17/2024, 11:30 AM
Appendix B.20 - EIM Participating Resource Scheduling Coordinator Agreement as of Jul 1, 2014 Tariff 03/21/2018, 1:48 PM
Appendix B.21 - Distributed Energy Resource Provider Agreement as of Jun 16, 2022 Tariff 09/16/2024, 10:49 AM
Appendix B.22 - Reliability Coordinator Service Agreement as of Nov 15, 2018 Tariff 11/15/2018, 4:45 PM
Appendix B.23 - Not Used as of May 17, 2024 Tariff 05/22/2025, 12:18 PM
Appendix B.24 - EIM Sub-Entity Implementation Agreement as of Apr 1, 2022 Tariff 04/15/2022, 12:37 PM
Appendix B.25 - EIM Sub-Entity Agreement as of Apr 1, 2022 Tariff 04/15/2022, 10:45 AM
Appendix B.26 - EIM Sub-Entity Scheduling Coordinator Agreement as of Apr 1, 2022 Tariff 04/15/2022, 10:45 AM
Appendix B.27 - EDAM Addendum to EIM Entity Agreement as of Dec 21, 2023 Tariff 12/21/2023, 2:57 PM
Appendix B.28 - EDAM Addendum to EIM Entity Scheduling Coordinator Agreement as of Dec 21, 2023 Tariff 12/21/2023, 2:57 PM
Appendix B.29 - EDAM Addendum to EIM Participating Resource Agreement as of Dec 21, 2023 Tariff 05/06/2024, 8:36 AM
Appendix B.30 - EDAM Addendum to EIM Participating Resource Schedule Coordinator Agreement as of Dec 21, 2023 Tariff 12/21/2023, 2:57 PM
Appendix B.31 - EDAM Entity Implementation Agreement as of Dec 21, 2023 Tariff 12/21/2023, 2:57 PM
Appendix B.32 - EDAM Load Serving Entity Agreement as of Dec 23, 2023 Tariff 12/21/2023, 2:57 PM
Appendix B.33 - EDAM Transmission Service Provider Agreement as of Dec 21, 2023 Tariff 12/21/2023, 2:57 PM
Appendix C - Locational Marginal Price as of May 01, 2026 Tariff 07/15/2026, 8:40 AM
Appendix D - Black Start Generating Units as of Nov 1, 2017 Tariff 03/21/2018, 1:51 PM
Appendix E - Submitted Ancillary Services Data Verification as of May 1, 2014 Tariff 03/21/2018, 1:53 PM
Appendix F - Rate Schedules as of May 1, 2026 Tariff 06/30/2026, 9:07 AM
Appendix G - Pro Forma Reliability Must Run Contract as of Feb 15, 2021 Tariff 02/19/2021, 8:32 AM
Appendix H - Legacy Reliability Must-Run Contract Provisions (including Legacy RMR contract) as of Sep 28, 2019 Tariff 06/15/2023, 8:55 AM
Appendix I - Station Power Protocol as of May 1, 2014 Tariff 03/21/2018, 2:02 PM
Appendix J - Grandfathered Standard Capacity Product Provisions as of Jun 30, 2021 Tariff 09/02/2021, 8:23 AM
Appendix K - Ancillary Service Requirements Protocol as of Aug 3, 2024 Tariff 12/17/2024, 11:30 AM
Appendix L-1 - Method to Assess Available Transfer Capability as of Aug 3, 2024 Tariff 12/17/2024, 11:30 AM
Appendix L - Not Used as of Jun 1, 2024 Tariff 06/18/2024, 9:43 AM
Appendix M - Dynamic Scheduling Protocol (DSP) as of Nov 6, 2018 Tariff 11/07/2018, 10:16 AM
Appendix N - Pseudo-Tie Protocols as of Jan 30, 2021 Tariff 02/02/2021, 3:33 PM
Appendix O - California ISO Market Surveillance Committee as of April 20, 2011 Tariff 03/21/2018, 1:49 PM
Appendix P - California ISO Department of Market Monitoring as of Jan 6, 2025 Tariff 01/10/2025, 10:59 AM
Appendix Q - Eligible Intermittent Resources Protocol (EIRP) as of Nov 1, 2023 Tariff 11/07/2023, 2:45 PM
Appendix R - Not Used as of Sep 9, 2020 Tariff 09/18/2020, 9:04 AM
Appendix S - Small Generator Interconnection Procedures as of Aug 3, 2024 (not accepting new applications) Tariff 12/17/2024, 11:31 AM
Appendix T - Small Generator Interconnection Agreement as of Sep 1, 2022 Tariff 09/22/2022, 1:11 PM
Appendix U - Large Generator Interconnection Procedures as of Aug 3, 2024 Tariff 12/17/2024, 11:31 AM
Appendix V - Large Generator Interconnection Agreement as of Sep 1, 2022 Tariff 09/22/2022, 1:11 PM
Appendix W - Amendment 39 Interconnection Procedures as of June 28, 2010

Not accepting new applications.

 Tariff 03/21/2018, 1:47 PM
Appendix X - Approved Project Sponsor Agreement as of Aug 3, 2024 Tariff 12/17/2024, 11:31 AM
Appendix Y - Generator Interconnection Procedures for Interconnection Requests as of Aug 3, 2024 Tariff 12/17/2024, 11:31 AM
Appendix Z - Large Generator Interconnection Requests Processed Under Generator Interconnection Procedures as of Sep 1, 2022 Tariff 09/22/2022, 1:11 PM
No results

View previous tariff appendices.

Current tariff appendices AA - MM

Title Type Posted
Appendix AA - Grandfathered Resource Adequacy Provisions for Feb 2018 to Mar 2018 as of Mar 16, 2018 Tariff 03/21/2018, 1:59 PM
Appendix BB - Standard Large Generator Interconnection Agreement as of Sep 1, 2022 Tariff 09/22/2022, 1:11 PM
Appendix CC - Large Generator Interconnection Agreement for Interconnection Requests in a Queue Cluster Window as of Sep 1, 2022 Tariff 09/22/2022, 1:11 PM
Appendix DD - Generator Interconnection Deliverability Allocation Procedures as of Jun 25, 2025 Tariff 06/27/2025, 10:21 AM
Appendix EE - Large Generator Interconnection Agreement for Generator Interconnection and Deliverability Allocation Procedures as of Dec 17, 2024 Tariff 12/18/2024, 11:50 AM
Appendix FF - Small Generator Interconnection Agreement for Generator Interconnection and Deliverability Allocation Process as of Dec 17, 2024 Tariff 12/18/2024, 11:50 AM
Appendix GG - Not Used as of Sep 9, 2020 Tariff 09/11/2020, 8:02 AM
Appendix HH - Not Used as of Sep 1, 2022 Tariff 09/22/2022, 1:11 PM
Appendix II - Market-Based Rate Authority Suspension as of Feb 15, 2021 Tariff 02/19/2021, 8:32 AM
Appendix JJ - Not Used Tariff 05/22/2025, 2:58 PM
Appendix KK - Resource Interconnection Standards as of Jun 25, 2025 Tariff 12/08/2025, 1:36 PM
Appendix LL - LGIA for Interconnection Requests processed under the RIS as of May 17, 2024 Tariff 05/22/2025, 12:18 PM
Appendix MM - SGIA for Interconnection Requests processed under the RIS as of May 17, 2024 Tariff 05/22/2025, 12:18 PM
No results

View previous tariff appendices.

Pending tariff changes

Browse pending tariff changes by section or appendix number, title and related docket number. See the Regulatory filings or Amendments page for more information on pending tariff language.

eTariff viewer

Use the eTariff viewer to research and view all publicly available documents and information on file within FERC’s eTariff system as of June 28, 2010, pursuant to Order 714.

Open eTariff viewer

Tariff amendments

View all publicly available California ISO-authored tariff amendment filings

Back to top