Originally Posted by MRBB
I called the Fl DMV and after talking to a few people was told if it bolts on to the frame, doesn't turn or sway like a ball hook up it's considered a frame extension. If it sticks out more than 4' from the main unit it needs lights and chains and must be registered as a trailer but it's not considered double towing.
Here is a pic of mine:
My investigation revealed the same - if the swivel trailer is "permanently" attached to the vehicle, it does not count as a trailer and won't count as triple towing in the states that prohibit triple towing.
You can argue with the DOT Cop about the definition of "permanent" but I'm guessing attaching it to your hitch receiver wouldn't pass the test.