Transport Canada developed emissions standards for locomotives under the Railway Safety Act; these were first published in draft form in June 2016. The Locomotive Emissions Regulations came into force on 9 June 2017. They mandate emissions standards for locomotives in line with the relevant EPA Tier 4 standards.
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 Locomotive Emissions Regulations, Canada Gazette, Vol. 150, No. 25, 18 June 2016. http://www.gazette.gc.ca/rp-pr/p1/2016/2016-06-18/html/reg4-eng.php
 Transport Canada, Overview of the Locomotive Emissions Regulations, 24 July 2017. https://www.tc.gc.ca/eng/railsafety/overview-locomotive-emisions-regulations.html
 Justice Laws Website, Locomotive Emissions Regulations (SOR/2017-121), 1 August 2017. http://laws-lois.justice.gc.ca/eng/regulations/SOR-2017-121/index.html
 Electronic Code of Federal Regulations, Part 1033 - Control of Emissions from Locomotives, accessed on 14 August 2017. Click here.
Last update: 17/08/2017