a drive schedule acceptance unit for accepting drive schedule data that represents whether or not the vehicle is to be used during {HEAD ~ a predetermined period} in {TAIL ~ the future}, and 
a drive schedule acceptance unit for accepting drive schedule data that represents whether or not the vehicle is to be used during { HEAD ~ a predetermined period } in { TAIL ~ the future } , and
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH