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Market Rule Amendments: Chapter 3


The IESO’s Market Assessment and Compliance Division (MACD) is engaging with stakeholders to discuss proposed updates to Chapter 3, “Administration, Supervision and Enforcement” of the market rules. These Chapter 3 amendments are being proposed with the aim to modernize and clarify rules related to some of the enforcement processes, including confidentiality and the dispute resolution process. These changes support a greater deterrence effect, increased clarity as well as efficiency.

In summary, the changes being proposed include:

  • Minor clean-up (language/formatting/grammar)
  • Changes to the confidentiality provisions to support enforcement actions
  • Clarity around the IESO’s broad right to gather information in its enforcement actions
  • Changes to the financial penalty provisions, including an increase to the lower financial penalties table
  • Consequential amendments to Market Manual 2.6

The IESO encourages all those interested to remain informed and active on this engagement. To be added to the distribution list for communications related to this engagement, or to submit comments and enquiries, please email

Related Information

Engagement Plan

Schedule of Activities

Date Engagement Activity Expected Actions

December 5, 2023

Following the November 21 engagement webinar, the IESO is seeking feedback from participants on the items discussed during the webinar. 

November 21, 2023

Engagement webinar to discuss and seek feedback on Chapter 3 amendments prior to IESO Technical Panel review and approval.

Recorded Presentation

This webinar was presented during the IESO's November stakeholder engagement sessions, see full agenda for more information.