I assumed the business about the duty. If it doesn't really reduce paperwork
otherwise, then it's of only half the potential value - as opposed to the EU where no
country to country paperwork is now ever required.
It reduces the paperwork somewhat but some remains. Some of the barriers
make a lot of sense. For instance the US has restrictions on the import
of citrus in order to protect it's crops. Canada doesn't have such
restrictions since it has no citrus crops to protect.
Some people have suggested moves towards a European style trade area but
almost no-one is ready for that.
I was under the impression that most N and S American countries ( if not all ) were
involved.
Nope. There are a whole set of agreements and I won't pretend I know
them all, or even more than a small subset.
The biggest is probably NAFTA which is Canada, US and Mexico. There is a
Canada/Chile agreement and a US/Carribean agreement. There are almost
certainly others.
Also of course the US has an embargo on Cuba.
Robert