This is only for British Columbia.

The TransLink Board of Directors has extended the newer vehicle model year exemption to include 2003 model year vehicles in 2006 and 2007. As well, the Board exempted all hybrid vehicles, effective January 1, 2006.

These policy changes mean a 2003 model year vehicle will not require an AirCare test until its first re-licensing in 2008 and all vehicles such as the Toyota Prius and the Honda Insight, which utilize a gas/electric hybrid technology, will no longer require an AirCare inspection as a condition of re-licensing.
Aircare

So that, if you have a car bought in 2005, you will be requried a aircare test when re-licensing in 2010.