The AESO values stakeholder input and invites all interested parties to provide their feedback on the REM updated high-level design via the following stakeholder feedback form by June 5, 2025 at 4:00 p.m. MT. Please be as specific as possible with your responses. Thank you for your input.

Purpose

The AESO has been working extensively with industry stakeholders and market participants, partner agencies and government to ensure the Restructured Energy Market (REM) design provides a strong foundation for the Alberta electricity system, ensuring it’s affordable, reliable, investable and sustainable for generations to come.

We have released a REM Updated High-Level Design that reflections the progression of the design as we moved through various phases of stakeholder engagement. This round of written feedback will be used to inform the upcoming Design Finalization Sessions and will assist in further refining and finalizing the REM.

The sections in this document correspond to those in the REM Updated High-Level Design Update and all questions also relate to it. We have identified specific areas where we are seeking additional input from stakeholders. Responses in each section are optional.

Instructions

1. Please fill out the sections below as indicated
2. Only one completed feedback form will be accepted per organization
3. To upload your completed feedback form:
   • You will need to be registered and signed in on the AESO Engage platform
   • You will need to be on the REM Technical Design page (https://www.aesoengage.aeso.ca/rem-technical-design), which can be found on the AESO website at www.aeso.ca and follow the path: AESO Engage (found on very top navigation bar) > REM Technical Design > Stakeholder Feedback > Written Feedback on REM Updated High-Level Design | May 22 to June 5, 2025
   • Click on the "Submit Stakeholder Feedback" box below to upload your completed feedback form
4. All responses will be shared on AESO Engage in their original format
5. Responses due by June 5, 2025 at 4:00 p.m. MT

Questions

1. Do you support the Registration/Eligibility section as described in the High-Level Design (HLD) Update? If not, why not?
2. Do you support the Day-Ahead Reliability Market for Operating Reserves section as described? If not, why not?
3. Do you support the Ramp Reserve Demand Curve (R30DC) section as described? If not, why not?
4. Do you support the introduction of a single ramp product (R30) replacing R10 and R60? If not, why not?
5. Do you support the Reliability Unit Commitment (RUC) section as described? If not, why not?
6. Do you support the Broad Market Power Mitigation section as described? If not, why not?
7. Do you support the Real-time Market section as described? If not, why not?
8. Which dispatch tie breaking option do you support as described? Option A or Option B
9. Do you support the Intertie Participation section as described? If not, why not?
10. In your view, should the AESO explore enabling pricing over the interties with sub-hourly scheduling? Please explain your response.
11. Do you support the Market Settlement section as described? If not, why not?
12. Do you support the Cost Allocation section as described? If not, why not?
13. Do you have any additional comments about the REM design that have yet to be addressed? Please specify.