ICAO Annex 10 is the reference and it applies worldwide.
The FAA may not have such a requirement at the moment within the CONUS because they may have restricted the FM spectrum to avoid the problem. However, FAA aircraft operating outside the US are required to conform to the requirments.
The GS being UHF is not affected.
What are you saying Fuji? using the GS without a LOC?
Everyone is still getting confused by the requirements to carry certain equipment to operate within certain airspace (it has to be fitted, and serviceable. It does not have to be turned on unless being used!) and a totally separate requirement to have a serviceable VOR or ILS equipment in order to use VOR or ILS information.
Ask anyone if they will try to fly an ILS with equipment that is placared as "U/S" or even "unreliable". I can guarantee that no sensible pilot will use such equipment in IMC.
Ask an avionics engineer to certify a non-FM immune instalation as fit for making ILS approaches and you will get a prompt no!
I feel it is only time before we have someone trying to fly using GS on nav 1 and the NDB to somewhere like Blackpool.
Accidents waiting to happen is the term I believe.
Regards,
DFC
PS: No explanation of the set-up you use for the GPS yet IO540?
"A 30deg NDB error is 1-2 miles off track" is bo
ox