- Delfland Water Control Board (since 2010)
- Schieland & Krimpenerwaard Water Control Board (since 2010)
- Municipal authorities Delft (since 2013)
- Municipal authorities Vlaardingen (since 2014)
- Municipal authorities Schiedam (since 2015)
8 April 16:00 - Malfunction
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Participants
The Regional Tax Group performs the tax affairs of the following government bodies: