I have an additional question about this topic.
An airport near our homebase has a CAT III ILS. A permanet notam report that the minumun RVR for app. are 100mt (so CAT IIIB). This notam is vaild untill the AIP will be changed. When the AIP will change how can a crew (let say from Livingston that car operate up 75m) know the minumun RVR for that app.??
p.s. I'm just a flight dispatcher.