With effect from January 1, the three-quarter tank rule will also apply to compressed natural gas (CNG) fuel supply tanks of CNG vehicles and petrol-CNG vehicles.
The rule currently applies to petrol fuel supply tanks of Singapore-registered motor vehicles leaving Singapore.
The Singapore Customs said the extension is because CNG becomes a dutiable fuel from January 1, 2012 as announced in Budget 2009.
The Minister for Finance had then said that an excise duty of S$0.20 per kg will be imposed on CNG from January 1, 2012.
This also means that from January 1, manufacturers of CNG will need to apply for a licence from Singapore Customs.
CNG manufacturers will have to account for the quantity of CNG fuel produced, dispensed and sold, and pay duties on a monthly basis.
CNG pump prices will also include duty and Goods and Services Tax (GST) from January 1.
Singapore Customs said it has sent letters to owners of CNG vehicles to inform them of the changes.
