GA Driver, the only reference I'm aware of to ADF's and ILS's is if you wish to apply the special alternate minima. CAO 20.18 does not specify which aids an A/C should have.
You probably know that to hold an instrument rating you must always be rated on the NDB as a minimum.
Of the 6 ILS installations at YSSY, only 2 pass over NDB's. Only 1 has a locator and that's at the MM.
NDB's I think will head the way of VAR's.
and be extinct in the not too distant future.