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Sector Participants > Market Operations > Market Rules & Manuals Library

Market Rules & Manuals Library

The Market Rules & Manuals Library contains the documents needed to interact in Ontario's electricity marketplace.

The Market Rules, which are approved by the IESO Board of Directors, govern the IESO-controlled grid and IESO-administered markets.

Market manuals and procedures, approved by IESO management, provide more detailed descriptions of the requirements for various activities specified in the Market Rules, and include the forms and agreements required by market participants.

The current set of market documents known as Baseline 42.1, was updated and published on December 4, 2019.

Further to the Ontario Energy Board’s Decision and Order on a Motion to Stay the Operation of the Amendments to the Market Rules (November 25, 2019), market rule amendments for Chapters 2, 3, 7, 9, 11 and Appendix 2.2, dated October 15, 2019 concerning capacity auctions are currently inoperative pending a final determination in the Application (EB-2019-0242).


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