The country is Norway. Unless you have a special trailers drivers license, you can not pull a trailer that has Gross trailer weight rating over what the car is approved for, even if it is empty and a lot under what the car can tow. But, if you have such a trailers drivers license, you can tow a bigger trailer, but have to keep it under the weight the car can tow. And I thought Norway was horrible for all kind of peculiar laws and rules when it comes to vehicles, but after I moved here I have discovered that there are rules here that are stricter than what I am used to. :D