I think the OP's point was that these are not certified in Canada. I thought USCG approved was ok in Canada or is that only for US boats visiting CA?
Ok, found this:
Safety Equipment Requirements
Foreign pleasure craft (pleasure craft that are licensed or registered in a country other than Canada) need to comply with equipment requirements of the country in which the vessel is usually kept.
If you are not a resident of Canada and are using a pleasure craft licensed or registered in Canada, all of the required safety equipment must meet Canadian safety requirements. However, you may opt to bring your own PFD for your own personal use.
For more information, consult the Small Vessel Regulations