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