Singapore legislation
Regulation 17
of Civil Aviation Authority of Singapore (Changi Airport) By-laws 2009
Regulation 17
Minimum safe distance from taxiing aircraft
Subregulation 1
The driver of a vehicle in the movement area shall, when driving the vehicle parallel to an aircraft taxiing on the taxiway, keep the vehicle within the red apron boundary line that separates the taxiway from the apron and away from the manoeuvring area.
Subregulation 2
The driver of a vehicle in the movement area shall keep a distance of at least 200 metres in front of or at least 250 metres behind any aircraft taxiing on the taxiway.