Originally Posted by
EvilGN
I do not have that plate in front of me at the moment, but here at KNPA we have a Y and Z ILS. One requires radar vectors, one uses a GPS wavepoint as an IAF on the base leg. So look at the bold face words and you will probably find the difference between the 2.
Only the "Y" has bold face, the "Z". The "Z's" say "SPECIAL AIRCRAFT & AIRCREW AUTHORIZATION REQUIRED"