Modifications to a car, pick - up truck, van, motorcycle, or moped can affect its registration class. Important : The DMV cannot examine your vehicle to determine the correct registration class. You must determine the correct registration class for your vehicle. 

Modifications to a motorcycle or moped, including Limited Use Motorcycles- 
If you remove a speed governor that was originally installed to limit the top speed of a moped or add a speed governor that limits the top speed of a moped or motorcycle , you must notify DMV and register the moped or motorcycle in the appropriate class [1]. 

Modifications to cars, pick-up trucks, and vans 
Part 106 of DMV Regulations describes the vehicles that are registered in the' Commercial' class and in the passenger class. Part 106 also describes how some modifications that you make to your vehicle can affect the correct registration class of your vehicle. A description of the modifications appears below. Each description includes a reference to the DMV Regulations [2]. For all vehicle modifications , you must obtain a vehicle weight slip. You can get vehicle weight slips at most vehicle and/or metal scrapyards and from some auto - parts stores and mechanics, especially those specializing in vehicle modifications and camper body / equipment sales and installation. 

Modifications that change a registration from 'Passenger' class to 'Commercial' class 


Cars (Part 106.2 (e)) 
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 rack to carry cargo. 

Station Wagons and Vans (Part 106.2 (f)) 
You can register a station wagon in the' Commercial' class if all the seats and all the seat fittings behind the driver are removed completely. 

Modifications that change a registration from 'Commercial' class to 'Passenger' class 


Pick-up Trucks (Part 106.6 (b) and (c)) 
You can register a pick - up in the' Passenger' cla

user: Hello I need information about the changes from the 'Passenger' class to the 'Commercial' class in vehicles

assistant: Do you want to know the information about Automobiles?

user: Yes

assistant: 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.

user: and how are the changes in vans?

assistant: You can register it in the 'Passenger' class if the truck has
     at least one side window behind the driver, and
     at least one seat or seat accessory set that is installed behind the driver

user: and these modifications are permanent?

assistant: 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.

user: and how are the modifications of the collection trucks made?

assistant: You can register a pickup in the 'Passenger' class if it meets certain conditions, depending on its empty weight.

assistant: If your pick-up truck has a curb weight of less than 6,001 lbs?

user: Yes

assistant: 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 commercial
    the van is used exclusively for non-commercial purposes

user: and these modifications are made under what regulation?

assistant: Part 106 of the DMV Regulations describes vehicles that are registered in the 'Commercial' class and in the passenger class. Part 106 also describes how some modifications you make to your vehicle may affect the correct registration class of your vehicle.