Hi Fedefly,
I haven't never heard about limit age,
but sincerely I don't know how they choose their pilot.
A friend of mine did his assessment with all guys 30 ys.
Another guy who finished the training with me , did the interview with only 20 ys people so..... who knows????
Anyway let me know, share your experience ,
it could be useful for all older ppruners! :-)