Funny guy, I'm pretty sure he's not referring to the LOC or GS
Probably lights, standby power, marker beacons etc etc.
Things that aren't obvious and need a table.
We used to have it in our OPS A but now it's in our NAVTECH guide under:-
-Route documents
-Minima
This table is not intended to be checked below 1,000' AAL, it's up to the commander to continue or not if a failure occurs below 1,000' AAL.