The USB host outputs {HEAD ~ a new power signal} compliant with {TAIL ~ USB VBUS power signal requirements} 
The USB host outputs { HEAD ~ a new power signal } compliant with { TAIL ~ USB VBUS power signal requirements }
OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL