( 3 ) Whereas to this end it is necessary to adapt the provisions relating to the locking angle of the steering of quadricycles and those relating to the removal of the key from type-3 devices designed to be fitted to tricycles and quadricycles; whereas , moreover , it is deemed appropriate to allow two- and three-wheel motor vehicles to be fitted with protective devices against unauthorised use which are approved for four-wheel motor vehicles.. This sentence is hard to understand. A simpler version with equivalent meaning is the following:
( 3 ) It is therefore advisable to adapt the regulations relating to the locking angle of the steering system of four-wheel vehicles and the removal of the key from type 3 devices intended for installation in three-wheel or four-wheel vehicles . It also seems appropriate to allow the installation of a security device against unauthorized use that has been approved for four-wheeled vehicles in two or three-wheeled vehicles .