Who Double Tows With Your Motorhome

Here's a research subject for you Mowermech, that section you posted includes almost identical language to California law, "(4) A passenger vehicle or truck of less than 2,000 pounds "manufacturer's rated capacity" may not tow more than one trailer or semitrailer, and this combination may not have a length in excess of 65 feet." That is exactly what California says except that in California the truck must be 4,000 pounds unladen weight. The difference being in California a motorhome is defined as a passenger vehicle, whereas in Montana they appear to define Motorhome as a recreational vehicle, however, I can't find a definition in the vehicle code for "Passenger Vehicle." Have you seen a definition of Passenger Vehicle that would exclude a motorhome?