Controlling use of a telephone line includes receiving a specification from a first entity that defines one or more supervisory controls on use of a controlled telephone line by a second entity. The assembly includes a switch frame for mounting the assembly, a magnet and a hall effect sensor mounted to the switch frame in a spaced apart relationship, and a vane that moves in response to the presence of a vehicle operator on the seat that causes the Hall effect sensor to provide an inhibit signal that prevents an engine from running. An exposure unit exposes the charged image carrier to light and forms an electrostatic latent image. The invention is also suitable for decryption. A needle restraining member is rotatably supported on the other shaft, for transmitting torque to the piercing needles when driven for rotation. In accordance with an aspect of the invention, blockages may also be established using the device to avoid selected areas, e.