adjusting each program clock reference time stamp of {TAIL ~ each scheduled program clock reference} bearing {HEAD ~ transport packet} based on a drift between said local clock and a program system time clock from which said program clock reference time stamp was generated, if any, and 
adjusting each program clock reference time stamp of { TAIL ~ each scheduled program clock reference } bearing { HEAD ~ transport packet } based on a drift between said local clock and a program system time clock from which said program clock reference time stamp was generated , if any , and
OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH HEAD HEAD HEAD HEAD HEAD HEAD 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 OTH OTH OTH OTH