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