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.

Milestones

Baseline 52.1 Baseline 53.0 Baseline 53.1 Baseline 54.0 Baseline 54.1
Technical Interface Documents
All technical interface documents relating to the upcoming IT Release Schedule are posted on the Pending Changes – Documents page for Market Participant comment. The IESO will post technical documents as they are made available and may not occur on the proposed date indicated. Documents may be deferred to the Market Facing document posting date. Refer to the IT Release Schedule for specific dates.

Sept 18, 2024

Dec 23, 2024

March 24, 2025

June 30, 2025

Sept 22, 2025

Baseline Plan
The baseline plan provides details of all document revisions, including stakeholder history and impact of change. It is made available as documents are identified for baseline inclusion. Documents submitted after impact assessment date will added to the plan under the heading “Update to Baseline”.

Oct 7, 2024

Jan 13, 2025

April 7, 2025

July 7, 2025

Oct 14, 2025

Market Facing Documents
New and revised market manuals and related documents are posted on the Pending Changes – Documents page. IESO initiates impact assessment, inviting market participants to review updated documents and provide feedback regarding document revisions.

Oct 9 - 25, 2024

Jan 15, 2025

April 9, 2025

July 9, 2025

Oct 15, 2025

Final Publishing of Documents
Final approved documents published on the IESO website.

Dec 4, 2024

March 5, 2025

June 4, 2025

Sept 10, 2025

Dec 3, 2025