president - "What does "non stadard ILS" imply on the jeppesen charts?"
I have also noticed this on some charts eg ILS 23R at DUS.
It tells me that I should plan ILS 23L as this is the preffered rwy for landing. ATC could however give us 23R.
the ATIS just says RWY 23 in use.
Another point is if we consider a complete comms failure. As the wind is the same for both 23L and 23R and both have ILS it takes the confusion out of which rwy to use when 'non standard' is written on one of them.