When I bought my HF Trailer in Chicago (off ebay along with my bike)I was worried about bringing it across the border. I read that you can't bring a "kit" trailer across.
So I left it in the US, came home and got a plate from one of my other trailers and just drove it across.
When I got home.....it became a home made trailer and I registered it as such.
No problem.
Turns out because the registration tag says "complies with all regulations" or something like that, it would be OK to import.
Anyway....as it turns out when I brought it across I had not tightened the plate very well and it is sitting somewhere between Rochester and Buffalo!
It came across with NO plate and it was not even mentioned.