An electric contact member for applying a development bias voltage to a development sleeve for developing an electrostatic latent image formed on an electrophotographic photosensitive drum which electric contact member is used by being attached to a flange to be attached to an end portion of the development sleeve. A processor is arranged to adjust a bias generator dependent on the frequency. The floor plate features an elongate groove-shaped recess extending parallel to the seat rail in the longitudinal direction of the aircraft in the immediate vicinity of one of the two seat rails, wherein an elongate extruded profile is arranged in said recess. The target application may read the registry and register values for each of the rule variables. The contacts are electrically coupled to the input connector and configured to selectively electrically couple the circuit select switch output contact to a generator circuit.