MGF, I think if the trailer is heavy enough you do need to inspect it.
The trailer I'm looking at probably would need it.
1. Inspection required. Except as provided in subsection 4, a commercial motor vehicle that is required to be registered in this State, is used in intrastate or interstate commerce and has a gross vehicle weight or gross vehicle weight rating greater than 10,000 pounds, including the gross vehicle weight rating or gross weight of any trailer or semitrailer, must be inspected annually pursuant to this chapter. Except as provided in subsection 4, a trailer or semitrailer that has a gross vehicle weight or gross vehicle weight rating greater than 7,000 pounds, independent of the towing vehicle, must be inspected annually. A trailer or semitrailer must also be inspected annually when:
A. Engaged in interstate commerce and used with a motor vehicle that has a gross vehicle weight or gross vehicle weight rating greater than 10,000 pounds, including the gross vehicle weight or gross vehicle weight rating of a trailer or semitrailer and load; or [2007, c. 348, §2 (NEW).]
B. Except as provided in subsection 4, engaged in intrastate commerce and used with a motor vehicle that has a gross vehicle weight or gross vehicle weight rating greater than 10,000 pounds, including the gross vehicle weight or gross vehicle weight rating of a trailer or semitrailer and load.