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Pending Changes - Documents

The list below provides advance notice of pending changes to the market rules, market manuals, technical interfaces documentation or other items that define the operation of the IESO-administered market. For changes that are minor, the listing will identify the document that is changing and a description of the revisions, but a link to the altered document may not be included.

Comments on the design and implementation concerns can be sent to pending.changes@ieso.ca. This feedback will be taken into account during the baseline schedule.

Details of all of the documents being revised for the current Baseline (and the next Baseline if available) can be found below.

See Document Library for previous Baseline Plans.

Pending Changes - Documents

Item Last Updated Comments Due Target Implementation
MM 1.7- Synchrophasor Data Requirements

Updates synchrophasor monitoring requirements for generators, transmitters, and electricity storage participants, including additional phasor data requirements.
14-Oct-2026 30-Oct-2026 To be published under Baseline 56.1.
MM 2.3- Market Rule Amendment Procedure

Complete rewrite of the manual in its entirety to conform to the renewed market manuals style and structure. As a result, there are no tracked changes in this version.
14-Oct-2026 30-Oct-2026 To be published under Baseline 56.1.
MM 5.5 - IESO-Administered Markets Settlement Amounts

Improves clarity and consistency in the interpretation and application of Emergency Activation Payment provisions.
15-Oct-2026 29-Oct-2026 To be published in advance of Baseline 56.1 on November 23, 2026.
MM 5.6: Non-Market Settlement Programs

To correct a typographical error in Section 3.1
14-Oct-2026 30-Oct-2026 To be published under Baseline 56.1.
LST-84 - IESO Charge Types and Equations

Provides greater clarity on the application of the In-Period Cleared UCAP Adjustment Charge (de-rate) calculation, including Notice of Disagreement (NOD) treatment, and forfeiture provisions.
15-Oct-2026 29-Oct-2026 To be published in advance of Baseline 56.1 on November 23, 2026.
MM 7.1 – IESO-Controlled Grid Operating Procedures

Changed section 2.4.1 title from Conservative Operations to Advisory Notices. The new Advance Notice is an advisory notice the IESO may issue one to seven days in advance of forecasted adverse conditions.
14-Oct-2026 30-Oct-2026 To be published under Baseline 56.1
MM 7.2 – Near-Term Assessments and Reports

 In Appendix C.1, clarified that the IESO may require and publish regulation service requirements above the minimum requirement to support operability needs.
 In Appendix D, Table D-1, added CHIP (Chatham inflow), BBO (Bruce B Output), and FABCW+NBLIP interfaces and updated descriptions and notes for existing interfaces to align with current operating security limit requirements.
14-Oct-2026 30-Oct-2026 To be published under Baseline 56.1.
MM 7.3 – Outage Management

Added provisions in sections 4.2 and 4.2.1 to support long-term outage planning and coordination.
14-Oct-2026 30-Oct-2026 To be published under Baseline 56.1.
MM 12.0 - Capacity Auctions

Replace email-based capacity test data submissions with a dedicated submission tool in Online IESO.
15-Oct-2026 29-Oct-2026 To be published in advance of Baseline 56.1 on November 23, 2026.
FORM 174 - Technical Feasibility Study Application

Update to the Technical Feasibility Study Application Form to combine the following forms into one.

Technical Feasibility Study Application - Generation Facilities (FORM 1380)
Technical Feasibility Study Application - Transmission Facilities (FORM 1381)
Technical Feasibility Study Application - Load Facilities (FORM 1052)
Technical Feasibility Study Application - Ancillary Services Facilities (FORM 1174)

14-Oct-2026 30-Oct-2026 To be published under Baseline 56.1.