Abstract of the Disclosure A safety bed rail for preventing an individual from falling out of a bed including a frame of sufficient width to span a width of the bed and having left and right portions adjustably connected by a releasable latch defining a plurality of discrete frame widths corresponding to standard bed sizes. A use of a first group of vehicle functions, which has not been permitted, is permitted when an authentication by an in-vehicle local collation part is completed in agreement. The key-top portion includes a display section for displaying a switching function and an area emitter which is integrally formed with the display section. The method also includes receiving a third signal indicative of a desired slip of the machine with respect to the surface. The invention is of particular interest for vaccine compositions comprising attenuated live viruses such as oral vaccine against poliomyelitis.