Singapore legislation
Regulation 6
Regulation 6
Warning flags on recumbent devices and recumbent bicycles
A person must not use a recumbent device or recumbent bicycle on a road unless a bright‑coloured flag on a vertical pole is attached to the recumbent device or recumbent bicycle, such that the flag is clearly visible by drivers of motor vehicles for a reasonable distance from the recumbent device or recumbent bicycle.