authorizing via the rewards server an award to the rewards qualified user of one of {HEAD ~ the plurality} of {TAIL ~ gaming machines} 
of
authorizing via the rewards server an award to the rewards qualified user of one of { HEAD ~ the plurality } of { TAIL ~ gaming machines }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL