| Item | Last Updated | Comments Due | Target Implementation |
|---|---|---|---|
| Market Manual 1.5 – Market Registration Updated the instructions for Changing an Authorized Representative to reflect the actual IESO practice. |
15-Oct-2025 | 31-Oct-2025 | Baseline 54.1 |
| Market Manual 4.1 – Submission of Dispatch Data in the Physical Markets Clarified the market rule references and location of the IESO established energy lamination volume limit and offer/bid quantity limit for virtual transactions. |
15-Oct-2025 | 31-Oct-2025 | Baseline 54.1 |
| Market Manual 4.3 – Operation of the Real-Time Market Added ‘TLRe – MIN’ reason code to the make whole payment eligibility and failure charges settlement treatment table. The reason code is applied only for capacity exports. Further description added in Table 4-2. |
15-Oct-2025 | 31-Oct-2025 | Baseline 54.1 |
| Market Manual 5.5 – IESO-Administered Markets Settlement Amounts The proposed market rule amendments and consequential market manual changes are non-substantive changes required to better align market rules and market manuals with the correct functioning of the renewed market. |
15-Oct-2025 | 31-Oct-2025 | Baseline 54.1 |
| Renewed – Charge Types and Equations The proposed market rule amendments and consequential market manual changes are non-substantive changes required to better align market rules and market manuals with the correct functioning of the renewed market. |
15-Oct-2025 | 31-Oct-2025 | Baseline 54.1 |
| Market Manual 5.6 – Non-Market Settlement Programs The proposed market rule amendments and consequential market manual changes are non-substantive changes required to better align market rules and market manuals with the correct functioning of the renewed market. |
15-Oct-2025 | 31-Oct-2025 | Baseline 54.1 |
| Market Manual 7.1 – IESO-Controlled Grid Operating Procedures Added “conservative” operating states under communication of abnormal conditions (section 5). Deleted “reliability directives” from section 5.1 as this is no longer relevant. |
15-Oct-2025 | 31-Oct-2025 | Baseline 54.1 |
| Market Manual 7.4 – IESO Grid Operating Policies Removed ‘zero series’ labelling and Market Transition section. Refer to Table of Changes for all other changes. |
15-Oct-2025 | 31-Oct-2025 | Baseline 54.1 |
| Market Manual 7.8- Ontario Power System Restoration Plan These confidential sections have been removed from this document to be housed separately. All subsequent sections are re-numbered accordingly. Removed requirement for end of line voltage verification for certain, shorter lines. |
15-Oct-2025 | 31-Oct-2025 | Baseline 54.1 |
| Market Manual 14.1 – Market Power Mitigation Procedures The changes provide details on the publication of potential constrained areas. |
15-Oct-2025 | 31-Oct-2025 | Baseline 54.1 |
| Market Manual 14.2 – Reference Level and Reference Quantity Procedures Revisions will provide more clarity to certain requirements for storage and thermal resources. |
15-Oct-2025 | 31-Oct-2025 | Baseline 54.1 |
| Market Manual 0.5.5 – IESO-Administered Markets Settlement Amounts Update to capacity obligation buy-out charge overview to reflect it being applied by the IESO pursuant to MR Ch. 7, ss. 18.4.4. |
08-Oct-2025 | 23-Oct-2025 | In advance of Baseline 54.1 |
| Renewed – Charge Types and Equations_LST-84_4.1 Modified charge type 1319 (Capacity Obligation - Buy-Out Charge) as part of the 2025 Capacity Auction enhancements. |
08-Oct-2025 | 23-Oct-2025 | In advance of Baseline 54.1 |
| Market Manual 12.0 Capacity Auctions These include changes to the buy-out process, self-scheduled test framework and time stamp under the new tie-break methodology in the Market Rules. |
08-Oct-2025 | 23-Oct-2025 | In advance of Baseline 54.1 |