in the case of two-wheel mopeds and two-wheel motorcycles, a system whereby at least two brakes on different wheels are actuated in combination by the operation of a single control;

in the case of three-wheel mopeds and tricycles, a braking device which operates on all the wheels;

in the case of motorcycles with sidecar, a braking device which operates at least on the front and on the rear wheel. Therefore a braking device which operates simultaneously on the rear wheel and on the sidecar wheel is regarded as a rear brake.