The authority deciding that is the German Transportation Law (Personenbeförderungsgesetz). In germany, cabs and cab-like services are treated as part of the pub

The authority deciding that is the German Transportation Law (Personenbeförderungsgesetz). In germany, cabs and cab-like services are treated as part of the public transport system, much as busses and trams and trains and subways. The license holder has certain rights, but the license also comes with certain obligations, for example the requirement to provide service to any person asking, to provide a minimum amount of service (i.e. make sure enough cabs are available) etc. Uber tries to skirt the obligations while still retaining the benefits and calls that "disruption". They get slapped down for that over and over again and then complain rather than fulfilling the obligations and then compete. If they don't like that, well, ignore the market.