I deal with literally hundreds of Technicians from several different Companies and have never seen that directive. Can you send me a PM, with the National Bulletin Number please.
No. It will no longer function as an HD Receiver when Bell switch to MPEG4. It could still function as an SD MPEG2 Dual Tuner PVR (just like a 5200) but Bell are going to remove ALL 9200's from the list of active receivers when the time comes.
It will still continue to function as an OTA HD PVR, afterwards providing that you still feed it with a satellite signal.