"The objective of the Heavy-duty Vehicle and Engine Greenhouse Gas Emission Regulations (the Regulations) is to reduce Greenhouse Gas (GHG) emissions by establishing mandatory GHG emission standards for new on-road heavy-duty vehicles and engines that are aligned with U.S. national standards." (Environment and Climate Change Canada, 2013)
"The standards will be implemented beginning with MY2014 vehicles and engines, and will be fully phased-in by 2018. They require CO2 emission reductions ranging from 6% to 23% in the MY2017 timeframe (as compared to a MY2010 baseline), as well as limits on N2O and CH4 emissions and A/C leakage." (http://transportpolicy.net/index.php?title=Canada:_Heavy-duty:_GHG)
Standards apply to model years 2014-2018