Originally Posted by
A_Reed
I was just curious as to why the US is placed in a different group than Canada.
There must be a reason why the French government did that, right?

I agree with you. The last sentence is incomprehensible:
If you are gainfully employed, the exemption only applies if you can produce a work permit ;
Contrast that with:
nationals of the following countries, whatever the reason for their stay:
Is it directed at those who come to France for business purposes?