i think they have revised alot of the manual especially on corrosion. as before as above, not within something important pass and advise, but now things like front crossmembers/inner wing sections all are included as load bearing points on a monocouque chassis.

i think! - i don't have a manual to hand so can't check.
although obviously the above isn't corrosion, it's a fracture which i think would be failure!