As far as we know, drones are not allowed to fly over the Natura 2000 area near Rockanje.
You can fly as a private person in the surrounding of Rockanje with a drone, if you adhere to the rules.
The current drone rules (for the surroundings of Rockanje) can be found on the website of the Dutch government: https://www.rijksoverheid.nl/drones.
However, the drone rules change regularly and are becoming increasingly stricter. We therefore recommend that you check regularly if current drone rules have changed.
Business use of a drone?
You may only fly professionally with a drone if you have a license. You can apply for this license at the Inspectie Leefomgeving en Transport (Il&T).
There is talk of business use if you want to earn money with the drone. Think of video production companies that make air surveys. You may also need a drone for your business. This is the case, for example, for inspection companies looking to see hard-to-reach places. Even then there is business use.