[h=1]Apparently its ok in MN..
Ask a Trooper: Is it illegal to have a ball hitch if I’m not pulling anything?[/h] By
Sgt. Neil Dickenson on Jul 5, 2015 at 6:30 p.m.42
Q: I was wondering if it is illegal to have the ball hitch in the receiver of my truck if I am not pulling any trailers at that time?
A: No, it is not illegal to have a ball hitch in the receiver of a truck when not pulling a trailer at that time. It is not illegal to have more than one ball hitch on the bumper. But with that being said, you need to be aware that multiple ball hitches on the bumper could obstruct the rear license plate.
Sgt. Neil Dickenson is a public information officer with the Minnesota State Patrol.
But not ok in Michigan
2012 House Bill 5610: Ban driving with trailer hitch except when towing
Introduced by Rep. George T. Darany (D) on May 9, 2012
To prohibit driving a vehicle with a trailer hitch unless actually towing a trailer. In other words, the hitch would have to be removed except when towing.
Official Text and Analysis.
So, how would this law be applied if I had one of those cargo carriers attached to the receiver ?????