do you want to register a car?
Yes
You can register a car in the 'Commercial' class if all the seats behind the driver are removed. Instead of the seats, you must install a permanent box or permanent shelf to transport the load.
I would also like to know how to register collection trucks?
You can register a pickup in the 'Passenger' class if it meets certain conditions, depending on its empty weight
And it doesn't matter if my truck is modified?
If your modified or unmodified pickup truck has a curb weight of less than 6,001 lbs. , you can register it in the 'Passenger' class if it meets the following conditions:    the truck doesn't have any commercials    the van is used exclusively for non-commercial purposes
and is it very necessary that the modifications be permanent?
of course These modifications must be permanent. If you use a van or light truck without the required modifications, then you must register it in the 'Commercial' registration class.
and what modifications are very necessary?