In Dutch law, copyright is protected under the Copyright Act. However, copyright does not only apply in the Netherlands. Despite the fact that copyright is protected in (almost) every country in the world, the individual laws are not cross-border and the rules may therefore differ per country. To solve this problem, copyright is internationally established in the Berne Convention of 1886.
Countries often have separate copyright laws. The best known copyright law regarding online publications is the Digital Millennium Copyright Act. This US law was introduced in 1998 primarily addresses the protection of digital copyrighted materials.
The Notice and Take-Down (NTD) Code of Conduct is used by intermediaries who provide a public (telecommunication) service on the internet in the Netherlands, such as StuDocu.
Therefore, if copyright infringement is committed in a specific country, it is best to look up local laws and see how they are handled.