Technical Panel - Market Rule Amendment Determinations
April 17, 2026
The Technical Panel is requesting feedback on two sets of market rule amendments:
- Updates to IESO Monitoring Requirements: Synchrophasor Data (MR-00487-R00): This proposal amends the market rules to extend the existing synchrophasor requirements for transmitters and generators to storage participants and will make other changes to these existing requirements for consistency and clarity. Comments are due by April 24.
- Updates to Contingency Event Definitions (MR-00491-R00): This proposal amends the market rules to align the defined terms for most severe single contingency and second most severe single contingency, with the defined terms used by the Northeast Power Coordinating Council (NPCC) and the North American Electric Reliability Corporation (NERC). Comments are due by April 24.
Communities and stakeholders can email their comments to rule.amendments@ieso.ca. The amendment proposals are available on the Proposed Market Rule Amendments webpage.