@spiton
For CATII/III there are two INDEPENDENT ILS rcvrs required. For my opinion this is for the A300 not the case. Even in CAT1 conditions I'm in trouble if this panel fails.
Sure, in an actual case there might be an airfield somewhere else than the alternate with weather at NP minimums or better, but this is just good luck, beside legal requirements.
Main systems on commercial A/C are designed double/trible INDEPENDENT , but this one is'nt for my understanding.
Regards