{TAIL ~ The method} 3, wherein the step of transmitting is performed when information regarding {HEAD ~ availability} of the specific radio communication service is not currently retained by the radio communication unit 
{ TAIL ~ The method } 3 , wherein the step of transmitting is performed when information regarding { HEAD ~ availability } of the specific radio communication service is not currently retained by the radio communication unit
TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH