Tartan, I don't know the current standards but being in border states, when I've had the options between something grown/produced in the US versus Canada, I pick the Canadian option as being more consumer friendly.
It used to be that US farmers were allowed to put in essentially formaldehyde plugs in the trees to keep the sap running longer which was forbidden in Canada. I also like Canadian standards for sausage and meat products and will buy accordingly as well.