The IESO is proposing a market rule amendment to amend a legacy requirement that the IESO Board directly set certain technical market parameters used in the calculation engines. The relevant parameters include: the maximum market clearing price, maximum operating reserve price, constraint violation penalties, settlement floor price for energy, and floor prices for offers for variable generation and flexible nuclear generation.
The IESO will also provide an update with respect to future planned amendment proposals, including a planned restatement of the market rule amendment process in MR Ch. 3, s.4, which process has not been materially updated since market opening.
The IESO will present a revised market rule amendment to address the legacy requirement for the IESO Board to directly set certain technical market parameters. Following stakeholder feedback received in September 2025, the IESO has updated its proposal. The revised approach proposes to incorporate certain foundational market parameters into the market rules, while others will be maintained in the market manuals.
The IESO will present a proposed minor rule amendment to a legacy requirement that the IESO Board directly set certain technical market parameters used in the calculation engines. The IESO will also provide an update with respect to future planned amendment proposals.
