Transport for London has reminded suburban (Yellow Badge) taxi drivers that they may only ply for hire inside the sector or sectors shown on their licence. In an email to licence holders, seen by TaxiPoint, TfL said that plying for hire outside those areas is an offence under article 31 of the London Cab Order 1934. TfL made clear that the rule applies however the passenger comes to the driver, whether by a street hail, at a rank or through a booking app. If a journey ends outside the driver's sector, the driver must return to their licensed sector before plying for hire again. Taxicard jobs can only be accepted while the driver is inside a licensed sector. This is not a new rule or a new enforcement campaign: TfL is restating the existing law. It encouraged suburban drivers who want to work across the whole of London to get an All London (Green Badge) licence through the Knowledge of London.