So far in this thread, I've had at least 3 different versions of what the previous requirements were:
1 - the rules required me to do an overhaul when recommended by the manufacturer
2 - the rules specified when an overhaul had to be done, and that may or may not have been at the same time as recommended by the manufacturer (but extensions were granted as a matter of course - a bit like ANO/CAO 48?)
3 - there was no rule that said I was allowed to go beyond the manufacturer's recommend overhaul time, therefore I had to get the overhaul done when recommended the manufacturer.
I look forward to any primary references that support any one of these versions.