One Pennsylvanian to another: The truck and trailer MUST be licensed, registered and insured** as antiques, and they may NOT be used in commerce/for profit in any way. If properly licensed, registered and insured** as antiques, they are exempt from commercial vehicle regulations including the driver needing to possess a CDL. Many of the DOT Men, bears, local yokels and even private Tag Bureaus are not familiar with the legislation and Pa MV Codes regarding these regulations. I would first check with PENNDOT to see about tagging the trailer. If they are confused or unfamiliar, I would then check with a REPUTABLE private tag bureau. Then if all else fails, you may have to get your State Representative involved as I had to when I was trying to tag my firetruck as an antique truck (long fucking story but they wanted to first tag it as an emergency vehicle because it was a firetruck, could not understand the fact that it was a privately owned vehicle and no longer a municipal firetruck- then when they got that through their thick skulls, I was told it had to have a "Truck" plates and registration because it's GVWR was in excess of 26,001 lbs- true, if it were being used in commerce, which of course it is not. Additionally when it comes to DOT Checkpoints, scales and even being pulled over for a traffic violation, not having inspection stickers or god forbid being involved in an accident, many cops don't know or understand the Pa MVC regarding antiques. I carry copies of the pertinent sections in my glove box, attached to my registration, insurance certificate and a recent CAT Scale certificate. ** Your insurance may have specific requirements or limitations, you must read and understand your individual policy.