I am not sure about 93 but my 98 dodge Diesel was sold in Canada and it had to have a couple of things done. I do not remember what but there was some sort of Re-certification listed on the carfax. It may have been as simple as the label on the door and hood.
I would call a dealer for the make and someone should know. Now if it is a car that was never sold here in the first place then you are in for some fun.