Yes, but this is rarely enforced, especially if the minicabs don't wait in front of a hotel, but just take a slow route home (Or if as in the case of Uber, they

Yes, but this is rarely enforced, especially if the minicabs don't wait in front of a hotel, but just take a slow route home (Or if as in the case of Uber, they get 'free'/unpaid time when they have no fare, as they are self-employed). What do Uber cars currently do when they don't have a fare?