If it is determined that {TAIL ~ the terminal} does not have an attribute certificate, the terminal transmits an attribute certificate issuance suggestion message for suggesting an attribute certificate issuing {HEAD ~ request} to the terminal  
If it is determined that { TAIL ~ the terminal } does not have an attribute certificate , the terminal transmits an attribute certificate issuance suggestion message for suggesting an attribute certificate issuing { HEAD ~ request } to the terminal
OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL 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 OTH OTH OTH OTH