Canada has, at least for now, realigned its medium- and heavy-duty diesel engine regulations with the United States.
Environment and Climate Change Canada (ECCC) recently announced it will use an interim order to modify its diesel engine regulations for model year 2027 engines to adhere to the proposed amendments to the Environmental Protection Agency’s (EPA) 2027 NOx regulations, which were announced in July and are expected to be finalized before the end of the year.
Canada has typically adopted U.S. emission regulations for its commercial trucking industry and was aligned with U.S. policy until the EPA announced its proposed amendments in July. Canadian law also enables the nation to temporarily amend its regulations when the two nations fall out of alignment, as cohesion with the EPA is foundational to Canada’s emission regulatory efforts.
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Through this provision, October’s interim order now gives manufacturers the ability to continue selling existing engine technology into the Canadian market in 2027 provided they pay a per-unit fee, similar to the non-conformance penalty pathway created by the EPA this year. Engines completed before Dec. 20, 2026, can meet current or future standards, engines completed after that date will need to adhere to the 2027 NOx regulations where the non-conformance penalties exist.
But ECCC’s action also does not extend that pipeline in perpetuity. The interim order “is in effect for a period of up to one year from the date the Interim Order was made by the Minister of the Environment” and was signed on Oct. 13. After that date, it will remain in effect until it is repealed, the changes are made permanent or it expires on the same date next fall.
