Singapore legislation
Regulation 42A
of Road Traffic (Motor Vehicles, Construction and Use) Rules
Regulation 42A
Filler pipe and fuel tank opening
Subregulation 1
All petrol driven motor vehicles to be registered for the first time in Singapore on or after 1st July 1992 shall be fitted with filler pipe and fuel tank opening of 21.3 millimetres diameters as stipulated in the Society of Automotive Engineers, Inc. (SAE) Recommended Practice 1140.
Subregulation 2
Paragraph (1) shall not apply to motor cycles and scooters.