An Act amending Title 75 (Vehicles) of the Pennsylvania Consolidated Statutes, in general provisions, further providing for definitions; in registration of vehicles, further providing for vehicles exempt from registration and for use of farm vehicle plates; in commercial drivers, further providing for definitions; and in inspection of vehicles, further providing for requirement for periodic inspection of vehicles, for operation of vehicle without official certificate of inspection, for securing loads in vehicles, for width of vehicles and for registered gross weight.