Could anyone please explain to me what a second stage FPL is? I've searched online, but can only find vague references to it in the Dutch AIP and in a Eurocontrol manual regarding the IFPS... and nowhere else. Is this a specific Dutch type of FPL? Or is it an ICAO/regional standard that no-one except the Netherlands uses? Or have I lost the plot completely and it is in fact something everyone uses and I've been asleep for while?