Trailer towing, weight.

Hello,

Let us say that I have a Mercury Grand Marquis (2000 lbs towing capacity), and a 1965 Dodge Dart (1500 lbs towing capacity), and a utility trailer with a 2000 lbs GTWR, can I tow that behind the Dart even if I keep the load under 1500 lbs, or even haul the trailer empty?
I am asking, a) I can not find the answer online for that, b) I come from a country where it in some instances is illegal to tow a 2000 lbs trailer behind a 1500 lbs car even if it is empty, just because you might load it to the limit and then have an accident.

Bill