Charley - I share your views and should have read your earlier post properly. I would agree it is a requirment the G/S must be FM immune whether in or outside controlled airspace. I think I am corect that the VOR is only "required" to be FM immune within controlled airspace. Presumably, subject to the afore, there is no issue with the schools etc operating IFR outside controlled airspace and engaging on all forms of approach except an ILS.