Key Dates

April 7 - 9 | Stakeholder Sessions | Workshop 1 registration *note the 8:30am start time*

• Click here to register for Day 1 (April 7)
• Click here to register for Day 2 (April 8)
• Click here to register for Day 3 (April 9)
• In-person registration request closes March 31

Mar. 31 |

• Workshop 1 Presentation (including filled scorecards) posted
• Stakeholder submissions for rate design proposals due
• Scorecard (fillable Excel to accompany stakeholder rate option proposals)

Mar. 17 | Workshop 1 materials posted

• AESO Pre-read materials
• FTI/AESO Longlist of Rate DTS Design Options Report

Mar. 11 | Guidance for Stakeholders on Rate Design Submissions posted

Feb. 27 | Materials posted

Cost of Service Studies & Scorecard Evaluation Criteria

• Cost of Service Studies Final Report
• Appendix 9 - Additional Analysis to Accompany Final COSS Report (undertaken in response to stakeholder feedback) 
• Cost of Service Studies and Evaluation Scorecard Directional Summary
• Cost of Service Studies Report Blackline (highlighting changes made in response to stakeholder feedback)
• Scorecard Evaluation Criteria

Benefit of Service Study

• Benefit of Service Study Final Report
• Benefit of Service Study Directional Summary
• Benefit of Service Study Report Blackline (highlighting changes made in response to stakeholder feedback)

Feb. 20 | Scorecard evaluation consolidated feedback posted

Feb. 17 | Scorecard evaluation & Intent to present due

Jan. 28 | Rate Design Parameters & Scorecard Development presentation posted

Jan. 27 | Stakeholder feedback posted

• Cost of Service Studies
• Benefit of Service Study

Jan. 21, 2026 | Stakeholder feedback due

• Cost of Service interim report
• Benefit of Service interim report

Dec. 10 | Benefit of Service Study Hybrid Stakeholder Session Registration

• Please request to attend in-person by Dec. 2, 2025

Dec 4&5 | Cost of Service Study Hybrid Stakeholder Session Registration (two half-days)

• Dec. 4 - Part 1
• Dec. 5 - Part 2
• Please request to attend in-person by Nov. 26, 2025

Nov. 27 | Materials posted

• Cost of Service Study stakeholder presentation
• Benefit of Service Study stakeholder presentation

Nov. 17 | Materials posted

• AESO Cover Letter - Interim Draft Study Reports
• Cost of Service Studies Executive Summary
• Cost of Service Studies Interim Draft Report
• Benefit of Service Study Interim Draft Report
• Stakeholder feedback questions for Cost of Service Studies (scroll down to view)
• Stakeholder feedback questions for Benefit of Service Study (scroll down to view)

Oct. 22-23 | MCOSS at the TRP & Amendments for the Connection Process Workshop

July - August, 2025 | 1-on-1 confidential interviews for the Benefit of Service Study

• E-mail ISOTariffRedesign@aeso.ca if you would like to participate

July 16, 2025 | Materials posted

• Final Hypothesis Statements
• Directional Summary

July 9, 2025 | Consultant Information Posted

• Benefit of Service Study Consultant Info. & Methodology
• Cost of Service Study Consultant Info.

June 4, 2025 | Consolidated stakeholder feedback on Draft Hypothesis Statements posted (directional summary to follow)

May 7, 2025 | Updated Draft Hypothesis Statements posted

May 1, 2025 | April 30 stakeholder session recording posted

April 30, 2025 | Stakeholder Session registration

April 16, 2025 | April 30 session presentation and Draft Hypothesis Statements posted

April 9, 2025 | Consolidated Stakeholder Feedback posted

April 3, 2025 | Stakeholder Feedback due

March 14, 2025 | Preliminary Consultant Statements of Work posted

March 5, 2025 | ISO Tariff Redesign Workstreams Kick-off information session