Thanks Mach E Avelli, I'm not so concerned about SEA PIFR either. And if you hold a MEA IR it seems if that lapses (or if you fail the proficiency check) you could still exercise a MEA PIFR for another year if required, so it still might be handy to know about it. The reason I mentioned the PIFR is I was surprised that the part 61 seems to mandate a flight simulator for the private rating, yet seems to leave it open to using a lower level device for the commercial/air transport level rating. Sort of seems the wrong way around.
However, my original question was where in the Air Legislation do we find a statement regarding the link between the level of a Flight Simulation Training Device and the credits available for that Flight Simulation Training Device for testing, recency, proficiency checking and renewal? It's sort of important if you are looking to invest hard-earned resources in such a device.