PPR (prior permission required)
PPR means an airport requires operators to request and receive permission before landing, separate from any national landing permit or air traffic slot. Many smaller and privately owned airports use PPR to manage parking, customs availability and opening hours; examples include Cannes-Mandelieu, Samedan (St Moritz), Sion and many Greek island airfields in summer, as well as airports with limited ramp space during major events. Lead times range from an hour to several days, and PPR may be refused if the ramp is full. Your operator or handling agent files the request; you simply need to understand that a small, convenient airport is not guaranteed to be available at the last minute.