A golf cart includes a frame, an adjuster, and a pair of suspension assemblies that reduce changes in camber angles in a pair of wheels caused by an adjustment of a ground clearance. The shoulder structure houses a first bevel gear and second bevel gear. The MAV defines the upper limit for the AR above which tracking is not allowed, discriminating between physiological rate variations and arrhythmic variations. Subsequently, if the function is called by the application program, the apparatus may determine values for the first authentication key, the second authentication key, and the third authentication key corresponding to the called function, and may perform authentication processing using the three authentication key values. The following conditional expressions are satisfied;1.