Ontario adds sweeping transition rules for environmental assessments moving to a new Part II.4 regime

Plain-language summary · AI-assisted · not legal advice

A major set of future-dated amendments (taking effect when a specific COVID-19 Economic Recovery Act provision is proclaimed, noted as January 1, 2027) rewrites how Ontario's Environmental Assessment Act applies to projects currently proceeding under approved class environmental assessments. The Municipal Class Environmental Assessment approval will be revoked, and projects that were partway through that process will be governed by detailed transitional rules that determine whether they continue under the old class EA process, convert to Part II.3, or shift to the incoming Part II.4 regime. Specific exemptions are carved out for shoreline and in-water works projects that had consultation, construction, or Planning Act applications underway before set cut-off dates, and for Ontario Northland Transportation Commission projects where construction began before December 31, 2025. Proponents with class EA processes in progress at the transition date can, in some circumstances, issue a written termination notice within 90 days to elect which framework applies, but must first provide advance notice to Indigenous communities and interested persons and allow at least 30 days for comment. Municipalities, private developers, and other proponents with active or planned projects subject to a class environmental assessment should assess where they stand in the process before the transition date to understand which framework will apply and whether any exemptions or elections are available to them.

Who this affects: municipalities with active class EA projects · private sector land developers · Ontario Northland Transportation Commission · proponents of shoreline and in-water works · environmental assessment practitioners