An application component receiving the request may acquire updated credential information from {HEAD ~ a user} or {TAIL ~ another entity} 
An application component receiving the request may acquire updated credential information from { HEAD ~ a user } or { TAIL ~ another entity }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH TAIL TAIL TAIL TAIL TAIL TAIL