If it is not in your contract there is no way they can dictate what you do in your own time. Even non-compete clauses are often dismissed in court (in the Nethe

If it is not in your contract there is no way they can dictate what you do in your own time. Even non-compete clauses are often dismissed in court (in the Netherlands) because they are overly restrictive for the employee. See for example http://jure.nl/bm2162 http://jure.nl/bm2162 Please do ask legal advice. There are lots of low-cost options for an initial opinion. Google "arbeidsrecht" and you'll find a few lawyers offering a first consult for free (check the google-ads as well).