What are the criteria for Class 3 vehicles in terms of weight and configuration?

Class 3 vehicles, as defined by the MOT (Motor Vehicle Inspection) standards in the United Kingdom, are primarily three-wheeled vehicles that meet specific weight and configuration criteria. These vehicles are categorized under categories L2 or L5, with a maximum unladen weight (ULW) of less than or equal to 450 kilograms. This classification is essential for vehicle inspections, ensuring that these unique vehicles adhere to safety and regulatory standards. Understanding the ULW requirement is crucial, as it directly influences the vehicle's suitability for registration and road use.