Open to correction, but I think this;
FAF is for NPA's. Do Precision approaches need an FAF? I'm not sure that he OM or 1000'agl is only for CAT 2/3. Surely it also applies to Cat 1.
Thus, for a precision approach of whatever category the approach ban is at OM or equivalent or 1000' AAL if no other point exists. For an NPA it is at FAF.
Please, the 100% correct answer.
Expanding it; will someone please give the 100% correct answer to the use of IAF for all approaches at all times.