Unfortunately while this is supposed to be the case it is not universally true. Some countries/airports have just changed the label without reassessing the approach.
In Europe, the onus is on the operator (as always!) to find this out for every approach they might use. This leads to many smaller operators and pretty much all ad-hoc charter companies just continuing to add the sink margin even if the plate says DA. The resource required to do the assessment far outweighs the benefit, since how often will that 50 feet make the difference?