System Reliability

The mandatory enforcement dates of NERC reliability standards and NPCC criteria are governed by Chapter 5, Sections 1.2.6 and 1.2.7 of the Market Rules. The following milestones are used to determine the enforcement dates for NERC standards in Ontario:

• NERC Board of Trustees adopts the standard
• Ontario Energy Board Review Process starts
• Ontario Energy Board Review Process ends
• The standard mandatory enforcement date in Ontario is determined
• The standard inactive date in Ontario is determined          

Milestones in Reliability Standard Development and Lifecycle (updated August 2020)

Deferred Ontario Effective Dates due to COVID-19

Revised IESO Generator Verification Testing Dates due to COVID-19

Implementation plans for certain reliability standards

• Notice to Market Participants: Completion of Ontario GIC Assessment for TPL-007-4, R5 and R9
• Implementation plans for certain reliability standards
• TPL-007 Versions 3 and 4 Implementation Plan
• TPL-007-3
• PRC-025-2
• PRC-002-2 (Updated July 12, 2016)
• PRC-005-2(i) and PRC-005-6 (updated September 13, 2017 - Footnote on Protection System maintenance/testing completed prior to July 1, 2016 for newly identified BES facilities)
• PRC-019-2; PRC-024-2 and MOD-025-2; MOD-026-1 and MOD-027-1