These vehicles are originally built by the base manufacturer and are classified as incomplete vehicles and require further manufacturing before they can be licensed and placed on the market. The number 3 is displayed on the model code of the Vehicle. The stage manufacturer who completes the vehicle to the point where it can be licensed is considered to be the final stage vehicle (completed).
It becomes their responsibility to certify the vehicle for compliance.
If a vehicle is completed within the guidance of the authorities, the final manufacturer must place a certification label on the vehicle. The final manufacturer is accepting full responsibility for the compliance of the vehicle.
These certification procedures are required by law and help to assure the purchaser that their completed or modified vehicle is safe, reliable and fully compliant. Vehicle certification is more than just sticking labels on vehicles.
Legally, the responsibility for certifying a completed work vehicle falls on the final manufacturer.