Said as if the Taxi lobbies in US cities aren't trying to do the same thing...

http://www.nytimes.com/2012/12/03/technology/app-maker-uber-...

  And one [rule] says limousines may not accept a request for a
  ride that is made less than 30 minutes in advance, which
  would impede Uber’s primary business model of connecting
  luxury car drivers with passengers immediately