I read (with much hope in my heart) it as: all the combined rent laws say that the max rent in X district is 5€/mo/sqm but you can charge 20€ for windowcleaning services and 1€/mo/sqm extra if the flat has an ikea bedframe and a bathtub. You enter the parameters of your rental agreement and the magic box spits out wether your situation is legal or not, then you just have to press a button to sue your landlord.

Bringing the boring old legal system closer to smart contracts.

But I don't have a clue if this is really the case.