Interesting document. Thanks for posting that.
For those who don't speak Dutch: what it basically comes down to is that the appeals are still pending, and the responsible cabinet ministers are waiting for the results of this appeal. But preliminary talks have taken place between the GA sector (represented, amongst others, by AOPA) and the branches of government that are responsible for these nature reserves and aviation.
The goal of these talks is to get a clear situation for pilots, and three situations have been identified:
1. Where the nature reserve is robust and disturbance is very unlikely, or unlikely to have a serious effect, normal aviation laws will apply. (500 feet rule and all that).
2. Where the nature reserve is slightly more vulnerable, a code of conduct will be agreed upon between the GA sector and the authorities. Probably just like it exists right now, where sensitive areas are marked on the chart and you plan to overfly these as high as possible, minimum 1500'.
3. Where the nature reserve is especially vulnerable, clear minimum heights will be identified and this will be put into legislation. Maybe in the same way the wetlands area Waddenzee is currently treated.
(Disclaimer: this is a rather loose and short translation of a much larger document with some of my own interpretations and examples thrown in. If anyone cares, feel free to put up a more formal translation.)