Or never if you work according to EU-OPS. Subpart G (Performance Class A) doesn't mention any beyond GS figure and all landing performance calculations (at least two every flight) use a landing distance with a minimum TCH of 50ft which can be lowered to not below 35ft for steep approaches of 4,5° or more.
Of course it can be different in other parts of the world, but EU-OPS does not allow the use of a beyond GS figure.