Amendments to UN R86 series 04 align requirements with EU standards. Direction-indicator lamps (DIL) scope expanded for arrangement D to all tractor lengths, with side retro-reflectors and marker lamps required when tractor length exceeds 4.6 m. Slow-moving vehicle rear marking plate maximum height changed from 1.5 m to as low as possible above ground, considering vehicle shape, structure, design or operational conditions. Additional requirements added to permit two supplementary DILs at front and/or rear. Automatic activation speed for manoeuvring lamps revised to 15 km/h from 10 km/h to prevent unexpected activation during work operations.