This "little" problem is causing no end of mayhem amongst most of the owners I know.
There does seem to be some interpretation however, with one lot of engineers disagreeing with another.
Our owners are in the same boat with a 172XP and the Pitts being affected, though the 172 seems to have got away with it for another couple of years since it has over 2 years left before it's CofA is due.
I would dearly love to find some guidance from someone who isn't interpreting or guessing. None of us have found this legislation anywhere in CAA land, but I haven't seen any EASA doc's. (Do they exist?)
Anyone operating on a permit will have a bonanza of cheap engines this year! (Stop rubbing your hands with glee Stik!)