Those parts aren't the hard ones?
You collect waterworks taxes the same way regular taxes are collected in NL. You get a letter with an amount to pay and you pay it. The waterworks is the entity that sends you the letter and manages the application of those taxes. The system that comment described is still in place today and operates in parallel to "regular" government.
> Those parts aren't the hard ones?
For an international resource it absolutely is. Everyone would lobby their government to ditch to make a sprint. (Well, China and America and possibly rising powers like India or the UAE would.)