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Dutch government information is always publicly available, unless there are valid, legal reasons to withhold some kinds of information. You can obtain government information in different ways. You can consult government websites. Or you can request government information under the Dutch Public Access to Government Information Act (Wet openbaarheid van bestuur, WOB). A request based on this Act is referred to as a WOB request (Freedom of Information, FOI). In some cases your WOB request may be rejected, for instance for security reasons or if it concerns confidential data related to people or companies. Public authorities may refuse a request for information which is manifestly unreasonable.
Submitting a WOB request
You can submit a WOB request to an administrative body in whichever way you prefer. For example, by telephone, email or letter. If this administrative body does not have the requested information, it must forward your request to one that does (forwarding obligation). The administrative body will make a decision within 4 weeks of having received the WOB request. However, this period can be extended if a request is substantial.
Reusing public sector information (open data)
Based on the Dutch Reuse of Public Sector Information Act (Wet hergebruik overheidsinformatie, WHO) you can submit a request to public institutions for information. After obtaining the information, you are free to exploit it commercially or non-commercially, for example by combining it with other information or by including it in your own product and services, such as apps, visulisations and analyses.