Preferably, {HEAD ~ all requester identifiers} for a single requester are not provided in a contiguous clump within {TAIL ~ a given priority vector} 
Preferably , { HEAD ~ all requester identifiers } for a single requester are not provided in a contiguous clump within { TAIL ~ a given priority vector }
OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL