The ultimate authority for anything that has to do with gambling is the Dutch Gaming Authority (Kansspelautoriteit - KSA), which was formed in 2012. The Gaming Authority has complete control on all aspects of gambling activity in the country.
In recent years, Netherlands has made significant progress towards regulating online gambling, with the passing of the Draft Bill on Remote Gambling. It creates the framework for online casinos to apply for a license, so local players can gamble legally. However, things aren't close to being complete with regard to the official legislative status of online gambling in the Netherlands and it is prohibited in the country.