Proposed Market Rule Amendments

Listed below are market rule amendments that are currently under consideration by the Technical Panel, or have been approved by the IESO Board but not yet incorporated into a baseline. All materials prepared for and considered by the Technical Panel are available on the Technical Panel webpage.

Starting in June 2019, the IESO has committed to publishing all of the materials that will be provided to the IESO Board in relation to its deliberations on proposed market rule amendments on this page. This practice is intended to provide greater transparency into IESO decision-making as it relates to market rule amendments and was implemented in accordance with IESO Board-approved recommendations informed by the Advisory Group on IESO Governance and Decision-Making.

Amendments that have been incorporated into a baseline are listed in the market rule amendments archive.

Last Updated

MR-00482-R00: 2024 Capacity Auction Market Rule Corrections

June 11, 2024

The Technical Panel requests that stakeholders review the following amendment proposal and provide comments to the Technical Panel by June 27, 2024.

Last Updated

MR-00454-R00-R03, MR-00461-R05, MR-00458-R00, MR-00459-R00, MR-00460-R00: Market Renewal Program – Market and System Operations & Calculation Engines

June 13, 2024

Provisional Board Decision With Reasons

May 30, 2024

Materials provided to the IESO Board for discussion.

May 16, 2024

The Technical Panel provisionally recommended the following market rule amendment proposals to the IESO Board at its June 7, 2024 meeting.

April 11, 2024

The Technical Panel requests that stakeholders review these amendment proposals and provide comments to the Technical Panel by April 19, 2024.

Last Updated

MR-00479-R00: Transmission Rights Market Enhancements and Platform Refresh

June 25, 2024

OEB Letter

June 2, 2024

Board Decision with Reasons

May 30, 2024

Materials to be provided to the IESO Board for Discussion

February 13, 2024

The Technical Panel recommended the following market rule amendment proposal to the IESO Board at its February 13, 2024 meeting

January 16, 2024

The Technical Panel requests that stakeholders review the following amendment proposal and provide comments to the Technical Panel by February 1, 2024 

Last Updated

MR-00478-R00: Corrections to Intertie Flow Limits Amendment

October 23, 2023

OEB letter

September 28, 2023

Board Decision with Reasons

September 21, 2023

Materials provided to the IESO Board for discussion.

September 12, 2023

The Technical Panel recommended the following market rule amendment proposal to the IESO Board at its September 12, 2023 meeting.

Last Updated

MR-00477: 2023 Capacity Auction Enhancements – Stream 2

October 23,

2023

OEB letter

September 28, 2023

Board Decision with Reasons

September 21, 2023

Materials provided to the IESO Board for discussion.

September 12, 2023

The Technical Panel recommended the following market rule amendment proposal to the IESO Board at its September 12, 2023 meeting

July 11, 2023

The Technical Panel requests that stakeholders review the following amendment proposal and provide comments to the Technical Panel by July 25, 2023.

Last Updated

MR-00452-R00, MR-00456-R00-R03, MR-00461-R04: Market Renewal Program – Market Settlements, Metering, Market Billing and Funds Administration

August 31, 2023

Provisional Board Decision With Reasons

August 22, 2023

Materials provided to the IESO Board for discussion.

June 15, 2023

The Technical Panel provisionally recommended the following market rule amendment proposals to the IESO Board at it June 13, 2023 meeting.

May 18, 2023

The Technical Panel requests that stakeholders review these amendment proposals and provide comments to the Technical Panel by May 26, 2023.

Last Updated

MR-00476: 2023 Capacity Auction Enhancements – Stream 1

July 18, 2023

OEB Letter

June 26, 2023

Board Decision with Reasons

June 23, 2023

Materials provided to the IESO Board for discussion.

June 15, 2023

The Technical Panel recommended the following market rule amendment proposal to the IESO Board at it June 13, 2023 meeting.

May 18, 2023

The Technical Panel requests that stakeholders review the following amendment proposal and provide comments to the Technical Panel by May 30, 2023.

Last Updated

MR-00457-R00 to R03 and MR-00461-R03: Market Renewal Program - Interim Alignment and Third Batch Definitions

June 8, 2023

Provisional Board Decision with Reasons

May 31, 2023

Materials provided to the IESO Board for discussion

April 20, 2023

The Technical Panel provisionally recommended the following market rule amendment proposals to the IESO Board at its April 18, 2023 meeting.

February 23, 2023

The Technical Panel requests that stakeholders review the following amendment proposals and provide comments to the Technical Panel by March 3, 2023.

Last Updated

MR-00471-R00: Updates to Synchrophasor Monitoring Requirements

October 20, 2022

Draft Market Manual

July 7, 2022

OEB Letter

June 2, 2022

Board Decision with Reasons

May 31, 2022

Materials provided to the IESO Board for discussion.

April 21, 2022

The Technical Panel recommended the following market rule amendment proposal to the IESO Board at its April 19, 2022 meeting.

March 22, 2022

The Technical Panel requested that stakeholders review this amendment proposal and provide comments to the Technical Panel by April 7, 2022. Feedback from Ontario Power Generation was received.

Last Updated 

MR-00461-R01: Market Renewal Program – Market Power Mitigation: Batch 2 Definitions

March 24, 2022

A majority of the Technical Panel provisionally recommended the following market rule amendment proposal to the IESO Board.

The Technical Panel requests that stakeholders review this amendment proposal and provide comments to the Technical Panel by March 1, 2022.  Note: No changes have been made to the version posted on January 20, 2022.

The Technical Panel requests that stakeholders review this amendment proposal and provide comments to the Technical Panel by February 3, 2022.


Last Updated 

MR-00455: Market Renewal Program – Market Power Mitigation

March 24, 2022

A majority of the Technical Panel provisionally recommended the following market rule amendment proposal to the IESO Board.

February 15, 2022

The Technical Panel requested that stakeholders review this amendment proposal and provide comments to the Technical Panel by March 1, 2022.  Note: No changes have been made to the version posted on January 20, 2022.

The Technical Panel requested that stakeholders review this amendment proposal and provide comments to the Technical Panel by February 3, 2022.

Last Updated 

MR-00461: Market Renewal Program - Batch 1 Definitions

April 22, 2021

The Technical Panel provisionally recommended the following market amendment proposal to the IESO Board at its April 20, 2021 meeting.

March 25, 2021

The Technical Panel requests that stakeholders review this amendment proposal and provide comments to the Technical Panel by April 6, 2021. Comments received can be found on the Technical Panel webpage.

Last Updated 

MR-00453: Market Renewal Program - Prudential Security

April 22, 2021

The Technical Panel provisionally recommended the following market amendment proposal to the IESO Board at its April 20, 2021 meeting.

March 25, 2021

The Technical Panel requests that stakeholders review this amendment proposal and provide comments to the Technical Panel by April 6, 2021. Comments received can be found on the Technical Panel webpage.

Last Updated 

MR-00451: Market Renewal Program - Facility Registration

April 22, 2021

The Technical Panel provisionally recommended the following market amendment proposal to the IESO Board at its April 20, 2021 meeting. 

March 25, 2021

The Technical Panel requests that stakeholders review this amendment proposal and provide comments to the Technical Panel by April 6, 2021. Comments received can be found on the Technical Panel webpage.

Last Updated 

MR-00450: Market Renewal Program - Participation Authorization

April 22, 2021

The Technical Panel provisionally recommended the following market amendment proposal to the IESO Board at its April 20, 2021 meeting.

March 25, 2021

The Technical Panel requests that stakeholders review this amendment proposal and provide comments to the Technical Panel by April 6, 2021. Comments received can be found on the Technical Panel webpage.